Aquarium Heater & Filter Size Chart (Maker Specs)
Last reviewed: Oct 6, 2026 · Next review planned: January 2027
Published heater watts and the tank range each maker states, plus filter rated flow and the tank size printed with it. Accessed October 6, 2026. 32 rows. A blank on the source is the words "not listed".
Use the chart next to the calculator, not instead of it. The calculator is this site's planning function for a stated room and target. A maker chart is that maker's band, under the conditions that maker printed. When two charts both contain the same gallons, both rows stay. This page does not pick one.
One worked example
Inputs: 20 gallons, room 68°F, target 78°F. The rise is 10°F. This calculator uses 4 watts per gallon for a rise above 9°F and at most 15°F. Raw watts are 20 × 4 = 80. The next standard size at or above 80 is 100 watts. One heater, because the two-heater note starts at 40 gallons.
The same 20 gallons sits in more than one published row. Aqueon lists it in the 50 watt band (5-20 gallons) and the 100 watt band (15-40 gallons), and that chart does not state a room. EHEIM type 3613 is 75 watts for 15.8-26.4 US gallons, at a 70°F room and water up to 79°F. Fluval E100 is 100 watts for aquariums up to 30 US gallons, and the E-series manual says those volumes are approximate for water up to 78°F with a 68°F room. Those are separate rows below. They are not averaged into 100 watts.
Download CSV of the same rows. Click a column heading to sort. The table is in the page before any script runs.
| Maker | Product | Kind | Watts | Rated flow as printed | Stated tank size | Conditions printed | Source |
|---|---|---|---|---|---|---|---|
| Aqueon | Heater wattage guidelines | heater | 50 W | not listed | 5-20 gallons | not listed | Aqueon heater chart (PDF) |
| Aqueon | Heater wattage guidelines | heater | 100 W | not listed | 15-40 gallons | not listed | Aqueon heater chart (PDF) |
| Aqueon | Heater wattage guidelines | heater | 150 W | not listed | 30-55 gallons | not listed | Aqueon heater chart (PDF) |
| Aqueon | Heater wattage guidelines | heater | 200 W | not listed | 50-75 gallons | not listed | Aqueon heater chart (PDF) |
| Aqueon | Heater wattage guidelines | heater | 300 W | not listed | 65-90 gallons | not listed | Aqueon heater chart (PDF) |
| EHEIM | thermocontrol 3611 | heater | 25 W | not listed | 5.2-6.5 US gal | Closed aquariums. Ambient room 21°C / 70°F. Desired water up to 26°C / 79°F. | EHEIM thermocontrol manual (PDF) |
| EHEIM | thermocontrol 3612 | heater | 50 W | not listed | 6.6-15.8 US gal | Closed aquariums. Ambient room 21°C / 70°F. Desired water up to 26°C / 79°F. | EHEIM thermocontrol manual (PDF) |
| EHEIM | thermocontrol 3613 | heater | 75 W | not listed | 15.8-26.4 US gal | Closed aquariums. Ambient room 21°C / 70°F. Desired water up to 26°C / 79°F. | EHEIM thermocontrol manual (PDF) |
| EHEIM | thermocontrol 3614 | heater | 100 W | not listed | 26.4-39.6 US gal | Closed aquariums. Ambient room 21°C / 70°F. Desired water up to 26°C / 79°F. | EHEIM thermocontrol manual (PDF) |
| EHEIM | thermocontrol 3615 | heater | 125 W | not listed | 39.6-53 US gal | Closed aquariums. Ambient room 21°C / 70°F. Desired water up to 26°C / 79°F. | EHEIM thermocontrol manual (PDF) |
| EHEIM | thermocontrol 3616 | heater | 150 W | not listed | 53-79 US gal | Closed aquariums. Ambient room 21°C / 70°F. Desired water up to 26°C / 79°F. | EHEIM thermocontrol manual (PDF) |
| EHEIM | thermocontrol 3617 | heater | 200 W | not listed | 79-106 US gal | Closed aquariums. Ambient room 21°C / 70°F. Desired water up to 26°C / 79°F. | EHEIM thermocontrol manual (PDF) |
| EHEIM | thermocontrol 3618 | heater | 250 W | not listed | 106-159 US gal | Closed aquariums. Ambient room 21°C / 70°F. Desired water up to 26°C / 79°F. | EHEIM thermocontrol manual (PDF) |
| EHEIM | thermocontrol 3619 | heater | 300 W | not listed | 159-260 US gal | Closed aquariums. Ambient room 21°C / 70°F. Desired water up to 26°C / 79°F. | EHEIM thermocontrol manual (PDF) |
| Fluval | E-series E50 | heater | 50 W (model E50) | not listed | up to 15 US gal / 60 L | Volumes are approximate for water up to 26°C / 78°F with a room temperature of 20°C / 68°F. A lower room, wide fluctuations, no cover, pumps or filters, or placement near cooling sources may require a higher wattage. | Fluval E-series manual (PDF) |
| Fluval | E-series E100 | heater | 100 W (model E100) | not listed | up to 30 US gal / 120 L | Volumes are approximate for water up to 26°C / 78°F with a room temperature of 20°C / 68°F. A lower room, wide fluctuations, no cover, pumps or filters, or placement near cooling sources may require a higher wattage. | Fluval E-series manual (PDF) |
| Fluval | E-series E200 | heater | 200 W (model E200) | not listed | up to 65 US gal / 250 L | Volumes are approximate for water up to 26°C / 78°F with a room temperature of 20°C / 68°F. A lower room, wide fluctuations, no cover, pumps or filters, or placement near cooling sources may require a higher wattage. | Fluval E-series manual (PDF) |
| Fluval | E-series E300 | heater | 300 W (model E300) | not listed | up to 100 US gal / 375 L | Volumes are approximate for water up to 26°C / 78°F with a room temperature of 20°C / 68°F. A lower room, wide fluctuations, no cover, pumps or filters, or placement near cooling sources may require a higher wattage. | Fluval E-series manual (PDF) |
| Fluval | C-series C2 | filter | 5 W | 119 US GPH / 450 LPH | up to 30 US gal / 115 L | Filter circulation printed for 120 V / 60 Hz. | Fluval C3 product page (C2, C3, C4 specs) |
| Fluval | C-series C3 | filter | 5 W | 153 US GPH / 580 LPH | up to 50 US gal / 190 L | Filter circulation printed for 120 V / 60 Hz. | Fluval C3 product page (C2, C3, C4 specs) |
| Fluval | C-series C4 | filter | 5 W | 264 US GPH / 900 LPH | up to 70 US gal / 265 L | Filter circulation printed for 120 V / 60 Hz. | Fluval C3 product page (C2, C3, C4 specs) |
| Fluval | C-series C2 | filter | 5 W | 106 US GPH / 400 LPH | up to 30 US gal / 115 L | Filter circulation printed for 230-240 V / 50 Hz. | Fluval C3 product page (C2, C3, C4 specs) |
| Fluval | C-series C3 | filter | 5 W | 127 US GPH / 480 LPH | up to 50 US gal / 190 L | Filter circulation printed for 230-240 V / 50 Hz. | Fluval C3 product page (C2, C3, C4 specs) |
| Fluval | C-series C4 | filter | 5 W | 238 US GPH / 900 LPH | up to 70 US gal / 265 L | Filter circulation printed for 230-240 V / 50 Hz. | Fluval C3 product page (C2, C3, C4 specs) |
| Aqueon | QuietFlow canister 200G | filter | not listed | 200 gph | up to 55 gallons | not listed | Aqueon QuietFlow canister instructions (PDF) |
| Aqueon | QuietFlow canister 300G | filter | not listed | 300 gph | up to 75 gallons | not listed | Aqueon QuietFlow canister instructions (PDF) |
| Aqueon | QuietFlow canister 400G | filter | not listed | 400 gph | up to 155 gallons | not listed | Aqueon QuietFlow canister instructions (PDF) |
| Aqueon | QuietFlow internal with SmartClean | filter | not listed | 0-35 GPH | 0-5 gallons, fresh or saltwater | Adjustable flow. Page prints 0-5G. | Aqueon QuietFlow internal filters |
| EHEIM | classic 150 | filter | 5 W at 50 Hz | 300 L/h at 50 Hz, approx. | about 50 L to approx. 150 L | US GPH not listed. Pump power and pump output are the 50 Hz figures. | EHEIM classic 150 |
| EHEIM | classic 250 | filter | 8 W at 50 Hz | 440 L/h at 50 Hz, approx. | about 80 L to approx. 250 L | US GPH not listed. Pump power and pump output are the 50 Hz figures. | EHEIM classic 250 |
| EHEIM | classic 350 | filter | 15 W at 50 Hz | 620 L/h at 50 Hz, approx. | about 120 L to approx. 350 L | US GPH not listed. Pump power and pump output are the 50 Hz figures. | EHEIM classic 350 |
| EHEIM | classic 600 | filter | 20 W at 50 Hz | 1000 L/h at 50 Hz, approx. | about 180 L to approx. 600 L | US GPH not listed. Pump power and pump output are the 50 Hz figures. | EHEIM classic 600 |
Fluval C4 prints 264 US GPH / 900 LPH at 120 V and 238 US GPH / 900 LPH at 230-240 V. Both pairs are copied as printed. EHEIM classic flow is litres per hour at 50 Hz. US gallons per hour are not listed on those pages, so this table does not convert them. AquaClear and Tetra Whisper are not rows here: on October 6, 2026 the AquaClear series page did not return a readable spec table, and the Tetra Whisper HTML that was retrieved did not include a GPH list. Shop listings were not used to fill those gaps.
Compiled with AI assistance from the sources below. Spot an error? Email jpanasuk@gmail.com.
Sources
- Aqueon. Aqueon heater chart (PDF). https://www.aqueon.com/-/media/project/oneweb/aqueon/files/us/educational/aq_heater_wattage_chart.pdf. Accessed October 6, 2026.
- EHEIM. EHEIM thermocontrol manual (PDF). https://www.eheim.com/media/pdf/c7/65/0c/3611-3619_thermocontroldPSgHh7gyBpLG.pdf. Accessed October 6, 2026.
- Fluval. Fluval E-series manual (PDF). https://www.aquasabi.de/cdn/fluval/Fluval_E-Serie_Heizer_DE_EN.pdf. Accessed October 6, 2026.
- Fluval. Fluval C3 product page (C2, C3, C4 specs). https://fluvalaquatics.com/us/shop/product/c3-power-filter-up-to-50-us-gal-190-l. Accessed October 6, 2026.
- Aqueon. Aqueon QuietFlow canister instructions (PDF). https://www.aqueon.com/products/filters-media/-/media/5DE5DADFDB064010B304DAFCD0413592.ashx. Accessed October 6, 2026.
- Aqueon. Aqueon QuietFlow internal filters. https://www.aqueon.com/products/filters-media/quietflow-internal-power-filters. Accessed October 6, 2026.
- EHEIM. EHEIM classic 150. https://eheim.com/en_GB/spare-parts/technology/external-filters/classic/classic-150. Accessed October 6, 2026.
- EHEIM. EHEIM classic 250. https://eheim.com/en_GB/spare-parts/technology/external-filters/classic/classic-250. Accessed October 6, 2026.
- EHEIM. EHEIM classic 350. https://eheim.com/en_GB/aquatics/technology/external-filters/classic/eheim-classic-350. Accessed October 6, 2026.
- EHEIM. EHEIM classic 600. https://eheim.com/en_GB/aquatics/technology/external-filters/classic/eheim-classic-600. Accessed October 6, 2026.
License for this compilation: Creative Commons Attribution 4.0. The manufacturer pages and PDFs stay the makers' own documents.
Changelog
Oct 6, 2026: first published, 32 rows from 10 source documents.