Filters & Heaters

Canister Filters: When You Need One, and Fluval's 07 Series Compared

Fluval 207 canister filter

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Quick answerA canister sits under the tank and can hold a lot of media (Fluval lists 3.9 to 9.2 L of canister volume), which helps on bigger or heavily stocked tanks. Fluval's 07 Series covers 10 to 100 gallons. Match the model to your tank: the 207 for 20-45 gallons, the 307 for 40-70, per Fluval. Look at the "filter circulation" number, not just pump output; that's the flow with media inside.

Canisters hold a lot of media and keep equipment out of sight. Specs below are from Fluval's 07 Series page. We haven't tested them.

Fluval 07 Series compared

107207307407
Tank size10-30 gal20-45 gal40-70 gal50-100 gal
Pump output145 GPH206 GPH303 GPH383 GPH
Circulation with media95 GPH121 GPH206 GPH245 GPH
Power10W10W16W23W
Canister volume3.9 L5.3 L7.3 L9.2 L

From Fluval's 07 Series spec page.

Why circulation matters

Habitattitude says an effective pump "will circulate your entire tank's volume several times each hour." Fluval's circulation figure is the realistic one. For example, the 207's 121 GPH on a 30 gallon tank is about four turnovers an hour (our arithmetic).

What's in the box

Fluval lists mechanical foams, carbon for chemical filtration, and BIOMAX biological media, which it says "promote beneficial bacteria growth." The listing says the EZ-Lift baskets let the media stack be removed "with just one finger."

Fluval 107 Canister Filter
10-30 gal

Fluval 107 Canister Filter

  • For aquariums up to 30 gallons (title)
  • Listed as up to 25% quieter than before
  • EZ-Lift media baskets
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Fluval 207 Canister Filter
20-45 gal

Fluval 207 Canister Filter

  • For aquariums up to 45 gallons (title)
  • Listed as up to 25% quieter than before
  • EZ-Lift media baskets
Check price on Amazon
Fluval 307 Canister Filter
40-70 gal

Fluval 307 Canister Filter

  • For aquariums up to 70 gallons (title)
  • Listed as up to 25% quieter than before
  • EZ-Lift media baskets
Check price on Amazon
Fluval 407 Canister Filter
50-100 gal

Fluval 407 Canister Filter

  • For aquariums up to 100 gallons (title)
  • Listed as up to 25% quieter than before
  • EZ-Lift media baskets
Check price on Amazon

Extra media

Fluval BioMax (500 g)
Fluval BioMax 500 g

Fluval BioMax (500 g)

  • Porous biological filter media, per the listing
  • Fits many Fluval canisters
  • Listing says replace only half at a time to keep bacteria
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Torn between two sizes? See Fluval 207 vs 307. For smaller tanks, a hang-on-back filter is simpler.

FAQ

Pump output vs circulation?

Circulation is the flow with media loaded.

Which size?

Match Fluval's rated tank range.

Quiet?

Fluval says up to 25% quieter than before.

Sources

  1. Fluval: 07 Series canister filters
  2. Habitattitude: Tanks, equipment, maintenance