OASE Filtosmart Thermo 100 Canister Filter
- Up to 30 gallons (100 L), fresh or saltwater
- Built-in heater with bi-metal control and thermal shutoff
- 10 ppi and 20 ppi foams plus ceramic media
- Adjustable flow at inlet and outlet
- 3 year warranty, UL certified
- 120 V, 8 x 5.5 x 8 in
Last refreshed Jul 1, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A compact canister filter with a heater built in, so the tank needs no separate heater inside it. Flow rate and heater wattage are not listed.
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ASIN: B07LH8N8R6Model: Filtosmart Thermo 100Category: Aquarium Filters
Overview
OASE builds the FiltoSmart Thermo as a small canister that filters and heats in one unit outside the aquarium. Foam and ceramic media clean the water, while a heater inside the canister warms it on the way back.
Moving the heater out of the tank removes clutter and stops fish from touching a hot element. Flow rate and heater power are not given, which makes it hard to size against a particular tank.
Who it's for
Planted tanks, nano reefs and display aquariums where in-tank equipment spoils the look gain from the combined unit. Keepers who size equipment by flow and wattage need more data.
Pros and cons
- Heater built into the canister
- Thermal shutoff for safety
- Flow adjusts at both ends
- Aquastop prevents spills
- Flow rate and heater specs not listed
- Rated only up to mid size tanks
Performance notes
Clarity comes from the coarse and fine foams trapping particles, with ceramic media hosting bacteria. Temperature is held by a bi-metal thermostat with thermal shutoff, and the dual flow valves let you slow the return for gentle fish.
Specifications
| Brand | OASE |
|---|---|
| Model | Filtosmart Thermo 100 |
| Dimensions & fit | |
| Item Dimensions L X W X H | 8 x 5.5 x 8 inches |
| Item weight | 16 ounces |
| Capacity & performance | |
| Tank capacity | Up to 30 gallons (100 L) |
| Flow control | Adjustable at inlet and outlet |
| Power & efficiency | |
| Voltage | 120 volts |
| Construction & materials | |
| Color | Black |
| Included components | |
| Included Components | Filter with heater, filter media, tubing, diffuser, spray bar, fittings, power cable, stable base |
| Unit Count | 1.0 Count |
| Warranty & support | |
| Manufacturer Warranty Description | 3 year limited |
| Other details | |
| Water type | Freshwater, saltwater |
| Heater | Built-in, bi-metal control, thermal shutoff |
| Filter media | 10 ppi coarse foams, 20 ppi fine foam, ceramic media |
| Certification | UL certified |
| Product Style | Filtosmart Thermo 100 |
| Specific Uses For Product | Indoor |
Frequently asked questions
How do you service the OASE FiltoSmart Thermo 100 without leaks?
Close the aquastop locks on the inlet and outlet, then detach the aquastop to move the filter without disturbing the tubing.
Does the OASE FiltoSmart Thermo 100 replace an aquarium heater?
Yes. The heater is built into the canister, so no in-tank heater is needed.
Can the FiltoSmart Thermo 100 run a saltwater tank?
Yes. It is rated for freshwater and saltwater tanks up to 30 gallons.
What is in the FiltoSmart Thermo 100 box?
The filter with heater, media, tubing, diffuser, spray bar, fittings, power cable and a base.