OASE Heatup Aquarium Heater Review and Setup
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If you searched for an OASE heatup aquarium heater, the OASE listing in our product data is a different product: the OASE BioMaster 2 Thermo 350, an external canister filter with a heater built in. The listing never uses the name Heatup, so this review does not claim that it is that heater. It covers what the BioMaster Thermo listing states about filtration, heating, maintenance, size and warranty, and who it suits. It is built for big tanks, so it is not a betta bowl product.
Quick answer
- The listing describes a canister filter with an integrated heater, controlled by bi-metal technology with a thermal shutoff.
- It is listed for freshwater and saltwater tanks up to 90 gallons, so it targets large tanks.
- If you wanted a stand-alone Heatup heater for a small tank, this listing is not that product.
- The listing mentions a 4-year warranty, 3 years plus 1 with online registration.
What this product is
The full name on the listing is OASE BioMaster 2 Thermo 350 Canister Filter for Aquariums, an external aquarium filter with a built-in heater. The title adds an EasyClean pre-filter, quiet operation, freshwater and saltwater use, and a capacity of up to 90 gallons. The specifications name the brand OASE, the model BioMaster 2 Thermo 350, a freestanding installation, a plastic body, and purification by mechanical, chemical and biological methods.
Understanding the difference matters for shoppers. A canister filter sits outside the tank, usually in the stand, and moves water through tubes. The heater here is part of that system instead of a separate stick in the tank. The listing says the integrated heater minimizes in-tank equipment while protecting inhabitants from direct contact.
Key facts from the listing
| Item | What the listing states |
|---|---|
| Brand and model | OASE BioMaster 2 Thermo 350 |
| Tank size | Up to 90 gallons (title) |
| Capacity (specification) | 340 liters |
| Dimensions | 9.4 by 9.4 by 16.7 inches |
| Weight | 7.78 kg |
| Filtration | Mechanical, chemical, biological; sealed 4-stage path |
| Heater | Built in, bi-metal control, thermal shutoff |
| Maximum TDS supported | 300 ppm |
| Warranty | 4 years (3 plus 1 with online registration) |
| Made in | Italy |
The specification also lists a maximum flow rate of 90 gpm. That figure looks high next to a 90 gallon tank rating, and the listing does not explain it, so treat it as a number as printed and check the product page or manual before you size a system around it.
Filtration
The first bullet describes an updated BioMaster with a sealed 4-stage filtration path. The stages are named as multi-density foams, Hel-X Biomedia and activated carbon, and the listing says this delivers superior water clarity for freshwater and saltwater tanks. Those are the seller’s claims. What can be stated plainly is the list of media: foams for mechanical filtering, Hel-X biomedia for biological filtering, and activated carbon for chemical filtering. That matches the three purification methods in the specifications.
The listing says the kit includes modular spray bar with a flow control attachment. A flow control attachment is relevant if you keep fish that prefer gentle water, though the listing does not discuss specific species.
The built-in heater
The heater is the reason this product turns up in a search for an aquarium heater. The listing says temperature is controlled through bi-metal technology with a thermal shutoff for safety. It does not give a wattage, a temperature range or a preset in the text we have. So we cannot say how many gallons the heater alone will warm, how precisely it holds a set point, or whether it can be adjusted. If those details decide your purchase, look for them on the manufacturer page before buying.
The package contents listed include a heater and a heater adapter, with 6 ft power cords. The listing says one cord is for the filter; the text we have is cut off before saying what the other is for, so we leave it at that.
One practical point follows from the design. Because the heater is inside the filter circuit, it only heats water that flows through the canister. If you switch the filter off for maintenance, you should also check that the heater is not running. The listing does not state how the unit behaves when the flow stops, so follow the manual.
Maintenance design
The listing spends two bullets on upkeep. The EasyClean pre-filter module can be removed separately from the rest of the filter, which the listing says makes maintenance fast and simple, raises filter efficiency and extends the life of the main foams. It also describes safety locks on the handle, the pre-filter and the aquastop to avoid spills during maintenance, and an aquastop that can be detached so the filter can be moved without affecting the tubing setup.
These are the features that distinguish a canister filter in daily use. Cleaning a pre-filter without opening the whole canister is the kind of task that otherwise puts people off maintenance. A general reference on filters notes that canister filters can be disconnected for maintenance without disturbing the tank, though their water-transfer tubes can be hard to clean. Plan to clean the tubes on a regular schedule too, and replace carbon at suitable intervals, as that reference advises.
What is in the box
The listing says it includes the fittings needed for your setup: curved inlet and outlet tubes, an inlet strainer, a water outlet nozzle, a modular spray bar with flow control attachment, tubing, a heater and a heater adapter, and 6 ft power cords. The text is truncated after the cords, so there may be further items. Check the product page before you rely on a particular fitting.
Who this product suits
A good fit for
- Keepers with a larger freshwater or saltwater tank, in the range up to 90 gallons the title gives.
- People who prefer a clean tank interior, with the filter and heater outside the display.
- Owners who value a long warranty period; the listing states four years, with the last year tied to online registration.
Not a good fit for
- A single betta in a small tank. A 9.4 by 9.4 by 16.7 inch canister is larger than most of the tanks in our small-tank guides.
- Anyone who wants to choose the heater wattage separately. The heater is part of the unit, and its wattage is not stated in the text we have.
- Anyone who needs a stand-alone OASE Heatup heater. This listing does not say it is one.
Setup notes drawn from the listing
- Plan the location. The unit is freestanding and about 16.7 inches tall, so it needs space below or beside the tank and access to the handle for maintenance.
- Assemble the tubing. Use the curved inlet and outlet tubes, strainer and nozzle or spray bar from the kit. The listing mentions the aquastop, which is the part you detach to move the filter without disturbing the tubing.
- Set the flow. The modular spray bar has a flow control attachment. Use it to tune the surface movement for your fish.
- Power it. The listing mentions 6 ft power cords, so measure the distance from the outlet before you set the position.
- Register. The listing says the fourth year of warranty comes with online registration.
For the heating side, follow the manual for the first start. The listing gives no instructions for filling or priming, and we do not invent them here. For small-tank heating, see our guide to aquarium heaters for betta fish, which covers small-tank heaters in more depth.
One unit or two: how to think about the trade-off
An all-in-one canister and heater has clear advantages on paper. There is one power setup to manage for filtering and heating, one less object in the display, and the heater is shielded from fish, which the listing presents as a benefit. The trade-offs follow from the same design. If the filter fails or needs cleaning, the heater is part of the same system, so you cannot treat the two jobs separately. A stand-alone heater, by contrast, can be replaced on its own, sized by wattage for the tank, and moved between tanks.
The listing gives you enough to judge the filter side but not the heater side. For the filter you have four named filtration stages, three purification methods, a spray bar with flow control and a maintenance design. For the heater you have only the control method and the thermal shutoff. That imbalance is the main thing to weigh before buying.
Questions to settle before you buy
- What is the heater wattage and temperature range? The text in our data does not say. Look on the manufacturer page.
- Will the tank fit the system? The title says up to 90 gallons; a much smaller tank gains little from a canister of this size.
- Is there room for a 9.4 by 9.4 by 16.7 inch unit? It is described as freestanding, so it needs a stable spot with access for the handle and pre-filter.
- Do you want to register for the extra warranty year? The listing ties the fourth year to online registration.
If you wanted a small heater
Small tank owners usually want a compact, preset heater. Our write-up of a Hagen Marina submersible heater for bettas is closer to that need than a canister system.
FAQ
Is the OASE BioMaster Thermo the same as the OASE Heatup?
The listing we have does not mention Heatup. It is the BioMaster 2 Thermo 350, a canister filter with a built-in heater. Treat them as different products unless the manufacturer says otherwise.
How big a tank is it for?
The listing title says up to 90 gallons. The specifications list a capacity of 340 liters, which is in the same range.
Does it filter saltwater too?
The listing says it delivers water clarity for freshwater and saltwater tanks, and the title says freshwater and saltwater.
How is the heater controlled?
The listing says temperature is controlled via bi-metal technology with a thermal shutoff for safety. It does not state a range or a wattage.
How long is the warranty?
The listing says 4 years, made up of 3 years plus 1 with online registration.
Is it quiet?
The title says quiet operation. That is the seller’s wording; no decibel figure appears in the text we have.
Bottom line
Buy this listing if you have a large tank and want a canister filter with the heater built in. Do not buy it expecting a stand-alone Heatup heater or a small-tank heater, and check the missing heater details, wattage and temperature range, on the manufacturer page first.
Sources
Aquarium filter (general reference on canister filter maintenance)
