SunGrow Aquarium Products for Betta Tanks: 9 Listed Items Compared

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SunGrow sells a run of aquarium products aimed at betta owners and small tanks, and this roundup covers nine of them: an air-driven sponge filter, a blue and white LED light, a stick-on thermometer, two feeding rings, a leaf hammock, a coconut shell cave, lava stones and a plastic plant. If you searched for sungrow aquarium gear, the short answer is that the sponge filter and the feeding rings have the clearest listed numbers, while the light and the lava stones need checking before you buy, because their listings disagree with themselves.

Quick answer

• The sponge filter needs an air pump that the listing does not include, and its bullets limit one unit to a tank of up to 10.5 gallons.
• The UF/IFAS betta guide says “Bettas prefer calm water,” and the sponge filter’s listing describes a slow current, so that current is the first feature to check.
• Settle the light’s wattage before you buy. The title says 4.8W, the specifications say 3.7 watts, and the bullets give no wattage at all.
• By the listed dimensions, the square feeding ring covers about 2.3 times the area of the round one.

What SunGrow lists in this set

The nine items below come from the SunGrow aquarium entries in the research pool. The table gives each item’s listed number and the place where its listing is silent or disagrees with itself. The one-piece thermometer is a variant of the three-piece pack, so it appears in the table without a card.

Item	Listed number	Where the listing disagrees or is silent
Sponge filter, two pieces	10 gallons (specifications); up to 10.5 gallons for one unit (bullets)	No flow figure; air pump not included
LED light, blue and white	4.8W (title); 3.7 watts (specifications)	Bullets give no wattage
Thermometer, three pieces	93 °F upper and 56 °F lower (specifications)	Specifications say digital; bullets describe a color change
Thermometer, one piece (variant, no card)	93 °F upper and 64 °F lower (specifications)	Specifications say analog; same design as the three-piece pack
Feeding ring, round	About 3 inches across; inner opening about 5.5 cm (bullets)	Tank range is given as “when space allows”
Feeding ring, square	4 by 4 inches (specifications)	Specifications say hand wash only and no warranty
Leaf hammock, two pieces	Two pieces per pack (bullets)	Specifications list “Stand” as the included component
Coconut shell cave	5 inches deep, 5 inches wide, 3 inches high (specifications)	No weight limit or fixing method in the listing
Lava stones, 50 pieces	0.2-inch stones (bullets)	Bullets say 0.5 oz (12 g); specifications say 0.01 kg
Plastic plant	6 inches (title and bullets)	Specifications list 10 inches high and outdoor usage

The table is the starting point for the rest of this article. Every number in it comes from the listing text, and the sections below explain what each number does and does not tell you.

Betta basics from the UF/IFAS pages

The UF/IFAS betta guide is the most direct page we opened for this roundup. Three of its lines matter for the SunGrow items:

• “Bettas prefer calm water as shown by research using flow as a stressor, so heavy filtration may actually be harmful to a betta’s health and welfare.”
• “Aquariums of limited volume and reduced filtration should be managed to include frequent water changes”
• “bettas thrive in warmer water and do not do well in cold water.”

The first line is about flow, so it governs the sponge filter and any water movement. The second is about maintenance. A filter that reduces filtration still needs regular water changes, which is why the sponge’s own bullets say to rinse the sponge in tank water during a change. The third line is about temperature, so it governs the thermometers and the light’s heat claim. The guide gives no betta temperature figure and no light schedule. The SunGrow listings give neither for their own products, so the numbers in the sections below come from the listings and from the arithmetic shown. For a flow-focused filter comparison beyond this brand, see best low flow filter for betta.

The sponge filter and its air pump

The sponge filter is the only SunGrow filter in this set, and it has no motor of its own. The bullets say that for it to function, you must connect it to an air pump, which is not included. The listing names no pump and gives no airflow figure, so the pump you connect sets the air supply, and the listing cannot tell you the resulting flow.

The specifications give a liquid volume of 10 gallons. The bullets say one unit suits a tank of up to 10.5 gallons. In metric terms, 10.5 times 3.785 = 39.74 liters. A 10-gallon tank leaves 10.5 minus 10 = 0.5 gallon of margin under the limit for one unit. The bullets do not say what to do with two units in one tank.

The UF/IFAS marine youth guide gives the general definition of this type of filter: “A type of filter that provides both mechanical and biological filtration.” That guide is written for saltwater tanks, so this article uses the definition only. Its biological part takes time to work. The UF/IFAS ammonia guide says, “A new biofilter requires six to eight weeks to build up sufficient bacteria to effectively reduce ammonia and nitrite levels.” That timing is for biofilters in general, and the pages we opened do not give it for this product. Plan for that build-up period rather than expecting full performance on day one.

The flow language is the maker’s. The bullets say the two sponges create “a nominal current,” with minor bubbles, and they describe the current as slow. Read with the calm-water line from the betta guide, that slow current is the feature to check first. The air pump is the setting you control, so choose it with the current you want in mind. The listing does not name a pump model, so no pump is recommended here.

Lighting: the wattage conflict and the hours

The LED light has the most conflicting numbers in this set. The title reads “4.8W Aquarium Light for Fish Tank, 24 LEDs, White & Blue.” The specification fields read “Light Source Wattage: 3.7 watts” and “Wattage: 3.7 watts,” and a separate field reads “Maximum Compatible Light Source Wattage: 1.5 watts.” The bullets state no wattage. The listing does not explain the 1.5-watt field. This article reports 4.8 watts as the title figure and 3.7 watts as the specified figure, and it does not choose between them.

Mounting is also unclear. The bullets describe “the adjustable clip that will fit onto all standard tanks,” while the specifications list “Table Mount.” The bullets also say that “the metal neck of the lights can be turned around 360 degrees,” so the arm can aim the light even though the mount type is unresolved.

The bullets say the light will “not affect the temperature of your tank water in any way.” That is the maker’s claim. The pages we opened do not cover heat from aquarium lights, so the claim stays a listing claim.

Hours are the other question. The UF/IFAS marine guide defines the term: “The amount of time each day that the aquarium lights are turned on.” The bullets say the light “can last up to 10,000 hours of use” and that it can run from a timer. Because lifetime depends on daily hours, the calculation below sets one assumed day length beside the rated figure. The eight-hour day is an input for the arithmetic only. The pages we opened give no daily hour figure for betta tanks.

10,000 divided by 8 = 1,250 days. 1,250 divided by 365 = 3.42 years.

Temperature: the two thermometers

The betta guide gives no number, but it does say “bettas thrive in warmer water and do not do well in cold water.” The UF/IFAS marine guide adds two lines that explain what a thermometer is for: “Constantly monitor your temperature, especially if you have a heater,” and “The thermometer is a device that will measure the water temperature in the system.”

The three-piece pack’s specifications list an upper range of 93 °F and a lower range of 56 °F. The one-piece variant lists 93 °F and 64 °F. Each scale is a subtraction: 93 minus 56 = 37 °F for the three-piece pack, and 93 minus 64 = 29 °F for the one-piece variant. The variant’s bottom end is 8 degrees higher, so its scale covers less of the cooler range.

The three-piece pack’s specifications say “Display Type: Digital” and list “High Accuracy” as a special feature. The bullets describe a color change instead: “the water temperature that the thermometer reads will change to a blue color.” The two descriptions do not match, the listing does not reconcile them, and it gives no accuracy figure. Treat the color as a guide.

The UF/IFAS ammonia guide gives another reason to read temperature alongside water chemistry. It says the un-ionized share of ammonia, which it calls the more toxic part, depends on the numbers below: “To determine the UIA fraction from the TAN measurement, the temperature and pH of the water must also be known.” A thermometer does not replace a water kit, but it supplies one of the numbers the guide says is needed. For a heater to pair with a thermometer, see do betta fish need a heater.

One reference point comes from the marine guide: “Most tropical fish and reefs will require a heater to maintain the tank at a constant 78°F.” That is a marine youth guide, so it is a general reference rather than a betta rule. It explains the thermometer’s purpose; it does not set a betta target.

Feeding rings: round against square

SunGrow lists two feeding rings. The round one is about 3 inches across, with an inner opening of about 5.5 cm and a hanging height of about 4.5 inches. Its bullets say it “Keeps floating flakes and pellets gathered inside the 3-inch (7.5 cm) ring.” The square one is 4 by 4 inches, or 10 cm by 10 cm. Its bullets say that placing food in the square “restricts the flakes and pellets from floating into the filter.”

Using the listed outer dimensions, the square’s footprint is 4 times 4 = 16 square inches. The round ring’s footprint is 3.14 times 1.5 times 1.5 = 7.07 square inches. The ratio is 16 divided by 7.07 = 2.26, so the square covers about 2.3 times the area of the round ring. This is a geometry check on the listed dimensions. It says nothing about how well either ring keeps food in place.

Both rings are plastic, and both use a black suction cup, per the bullets. The square’s specifications add “Hand Wash Only” and “No Warranty.” The round ring’s specifications give no warranty figure. Both listings also carry generic category fields. The square’s specifications include “Dog Breed Size: Small” and “Breed Recommendation: Small Breeds,” which describe nothing about a feeding ring, so this article does not use them.

The pages we opened do not discuss feeding rings. Their fit therefore rests on the listing’s dimensions and bullets, not on a sourced feeding guide.

Hammock, cave, stones and plant

The leaf hammock is a two-piece pack with suction cups. The bullets say it is “advisable to install this Twin Leaf Pad approximately 1 inch from the water level,” and that this lets a betta gulp air from the surface. They also say to rinse the pads before use and to make sure the surface is dust-free so the suction cups stick. The bullets say males can use the pad for a bubble nest. The UF/IFAS betta guide describes the bubble nest in one sentence: “The bubble nest allows eggs to develop in environments with elevated temperature and low pH and dissolved oxygen.” That describes bubble nests in general, not this pad. The specifications list “Stand” as the included component, which the bullets do not describe, and the listing does not say which is in the box. For a bed-style hammock to compare, see best zoo med betta bed leaf hammock.

The cave is a single coconut shell piece, listed at 5 inches deep, 5 inches wide and 3 inches high. The bullets describe its “single opening,” which gives “a sense of privacy and security,” and say its edges are smooth. They advise rinsing before use and a post-boil soak in fresh water. The listing gives no weight limit and no fixing method, and it does not say whether the shell floats.

The lava stone pack is 50 pieces of brown volcanic stone, listed at 0.2 inches each. The bullets call them an “Ideal Substrate for Fish and Plants” and describe a “stable surface for your betta to explore and rest.” One bullet says each 50-piece pack “weighs 0.5 oz (12 g).” That pairing does not hold: 0.5 times 28.35 = 14.18 grams. The specifications give 0.01 kg for the item and 0.32 ounces for the package, and 0.32 times 28.35 = 9.07 grams. The title says “for Filtration,” but the bullets describe decor and a substrate, so this article follows the bullets. Nothing in the listing calls the stones a filter medium.

The plastic plant is listed at 6 inches in the title and bullets, with silk leaves and soft rubber tendrils. The bullets say it stands upright, that it works as “THE ONLY PLANT” in a tank from 10 gallons up, and that it needs no installation: “Simply place it firmly on the substrate.” The specifications list “5”D x 10″W x 10″H,” a base of 4 inches, and “Indoor Outdoor Usage: Outdoor.” The 10-inch height and the outdoor label do not match the 6-inch figure, so the plant’s real size is unclear from the listing. For live plants to pair with a plastic one, see best live plants for betta fish tank.

Electrical care for the light and the pump

The LED light is corded electric, per its specifications, and its bullets mention a 110-240V range. The sponge filter’s air pump is not in the box, and the listing gives no power rating for any pump. Two CPSC lines from the pool and spa guidance we opened apply to any electrical product near water. The first is: “If an electrical product falls into the water, unplug it before touching it.” The second describes the protective device: “Ground Fault Circuit Interrupters (GFCIs) are the best protection against electrocution.” The page is written for pools and spas, so use these as general rules, not as aquarium distances or product instructions.

The listing gives no cord length, so there is no cord plan to check against. If the light or the pump falls into the water, the CPSC line applies directly: unplug it before touching it.

A 10-gallon example

Take a 10-gallon betta tank with the sponge filter, the LED light, the three-piece thermometer and one round feeding ring. The tank volume sits inside the sponge filter’s 10.5-gallon limit for one unit, with 0.5 gallon of margin. You still need an air pump and airline, which the listing does not include, and the light’s wattage question is unresolved.

The cave and the leaf hammock add hiding and resting places, and both listings say to rinse before use. The UF/IFAS guide’s advice on frequent water changes applies because the sponge filter is the only filtration in this build. The ammonia guide’s six-to-eight-week biofilter timing means the first weeks need more attention, not less.

Mistakes to avoid

• Buying the light on the title wattage alone. The specifications give a different figure, and the bullets give none.
• Expecting the sponge filter to run without a pump. The bullets say the pump is not included.
• Reading a thermometer’s color change as a measured number. The listing gives no accuracy figure.
• Treating the breed and dog-size fields in the specifications as product details. They describe no fish product.
• Assuming the plant is six inches tall everywhere. The specifications say 10 inches.

How we chose

We started from the twelve SunGrow entries in the research pool and dropped three. The 50-leaf Indian almond pack is titled a water conditioner, and its bullets make health and scale claims that the pages we opened do not cover. The pack that combines water conditioner balls with 1 oz of betta pellets is a conditioner and a food, not an aquarium fitting, and its listing is three lines long. The one-piece thermometer repeats the three-piece design, so it stays in the table as a variant.

Four rules decided what stays:

1. The item is an aquarium or betta product by its own listing: a filter, light, thermometer, feeding ring, hammock, cave, stone or plant.
2. Its title does not present it as a water conditioner or a food.
3. Where the title and the bullets disagree, the text uses the bullets. Where the bullets are silent, the text says so and uses the specifications.
4. No money figure, star rating, review count or badge appears, because the research file stores none.

The cards follow the order of the research file. That order is not a ranking, and no item is named the best overall.

What we could not verify

• Sponge filter flow, air use and noise. The listing gives no gallons-per-hour figure and no decibel figure. The UF/IFAS pages we opened do not cover sponge filter flow in a home tank.
• The light’s real wattage. The title says 4.8W, the specifications say 3.7 watts and a separate maximum of 1.5 watts, and the bullets give none. The 1.5-watt field is unexplained.
• The 10,000-hour rating. It is the maker’s figure, and the listing states no method. The eight-hour day in the calculation is an assumption.
• The claim that the light does not change water temperature. It appears only in the bullets.
• Thermometer accuracy. The specifications say High Accuracy and list a set of standards, but the listing names no certificate or method, so this article does not treat those names as certification.
• Whether the lava stones change the water. The bullets say they help keep conditions steady and encourage beneficial interactions. The pages we opened do not cover lava stones, so this article repeats none of that as fact.
• The plant’s real height and whether it is meant for indoor use. The title says 6 inches, and the specifications say 10 inches high with outdoor usage.
• The leaf hammock’s included parts. The bullets describe suction cups, and the specifications name a stand.
• Any SunGrow product in a UF/IFAS page. None of the pages we opened names a SunGrow product.
• The CPSC page is written for pools and spas, and the UF/IFAS marine guide is written for saltwater tanks. Both are used here for general rules only.

FAQ

Does the SunGrow sponge filter need an air pump?

Yes. The bullets say the sponge filter must be connected to an air pump, and the pump is not included. The listing does not name a pump or give an airflow figure, so the pump you choose sets how much air the filter gets.

Which SunGrow light wattage is right for a betta tank?

The listing does not settle it. The title says 4.8W, the specifications say 3.7 watts, and the bullets state no wattage. The light is corded electric, so unplug it before touching it if it falls into the water, as the CPSC line above says.

Is the square or the round feeding ring better?

The pages we opened do not compare feeding rings. By the listed dimensions, the square ring covers about 2.3 times the area of the round one. Choose the size that fits how much surface you want to cover, and note that the round ring’s bullets give a tank range of about 3 to 20 gallons when space allows.

Is a sponge filter too strong for a betta?

The UF/IFAS betta guide says heavy filtration may be harmful to a betta, and this sponge filter’s listing describes a slow current. The listing gives no flow figure, so you cannot compare it with a powered filter in gallons per hour.

Can the thermometer show an exact temperature?

The listing describes a color change and lists High Accuracy as a special feature, but it gives no accuracy figure or method. Use the color as a guide rather than as a calibrated reading.

Bottom line

Match the sponge filter to a tank of 10.5 gallons or less, and plan the air pump yourself. Buy the LED light only after you settle its wattage, because the title and the specifications do not agree.

Sources

• UF/IFAS, Evolution, Culture, and Care for Betta splendens (FA212): https://ask.ifas.ufl.edu/publication/FA212 (opened 2026-10-20)
• UF/IFAS, Ammonia in Aquatic Systems (FA031): https://ask.ifas.ufl.edu/publication/FA031 (opened 2026-10-20)
• UF/IFAS, 4-H Marine Aquarium Project Book (4H433): https://ask.ifas.ufl.edu/publication/4H433 (opened 2026-10-20)
• U.S. CPSC, Ways to Protect Yourself and Others From Shock or Electrocution (PDF): https://cpsc.gov/s3fs-public/WaysToProtectYourselfAndOthersFromShockOrElectrocutionuUpdated07312019.pdf (opened 2026-10-20)