Aquatics Unlimited: Articles: Fast Flow Canister Filters
Image 1
Image 2
Image 3

Fast Flow Canister Filters

for the week of 3/18/99

Represented by the Magnum® and Lifegard® lines, fast flow canister filters are designed to cause a substantial current in the aquarium, and catch a fair amount of solid waste before it settles to the tank bottom.

Advantages. By definition, fast flow filters are excellent mechanical (trap solid waste) filters. They catch fish droppings and excess food effectively enough to keep an aquarium visibly cleaner, and can reduce the number of water changes needed. In addition, many can be outfitted with activated carbon or other adsorptive media to perform chemical (removal of certain dissolved chemicals) filtration, although less efficiently than slower flow units. Their rapid flow outputs also can provide significant aeration to sustain the fish directly and to encourage biological (bacterial breakdown) filtration elsewhere in the aquarium.

Disadvantages. Since they catch so much solid waste, fast flow filters clog rapidly, reducing their ability to filter mechanically, chemically or biologically, as well as their ability to aerate. They need to be cleaned regularly (often every 2 to 4 weeks), and certainly should not be allowed to slow to a halt. Backup aeration is encouraged so that dissolved oxygen levels remain high even as filter is slowing.

Best tanks to use fast flow filters. Fast flow filters can be used on almost any aquarium, but are ideal for tanks containing larger fish with great solid waste output. They are also excellent for active, schooling fish that enjoy the current created.

Sizing. A fast flow filter should turn over the volume of the tank somewhere in the neighborhood of 6 to 10 times per hour. Thus, a 30 gallon aquarium filter should be rated at 180 to 300 gallons per hour. Too slow a filter will be unable to keep up with solid waste, and too fast a unit may actually create too much current for the tank's residents. Several filters may be combined to reach the required flow rates on larger aquariums.


"Tip of the week" appeared regularly in 1999 and 2000.

Copyright © 1999 Aquatics Unlimited
All rights reserved.

Local Specials

Through 9-28-17

eLive Betta Bowl & Planter 30% OFF!

Biorb Bubble Aquariums** 30% OFF!

Cobalt Color Flakes 20% OFF!

Aquavitro Products 20% OFF!

Pond Fish 30% OFF!

Pond Plants 30% OFF!

Select Saltwater Fish 20% OFF!

Select Corals 15% OFF!

Dry Base Rock 20% OFF!

Live Tigriopus Pods 20% OFF!

Live Phytoplakton 20% OFF!

All Fish on North Wall 20% OFF!

2.5 tank $14

5.5 tank $15

10 tank $17

15 tank $33

20H tank $35

20L tank $35

29 tank $63

45 tank $99

REWARDS account may be required for special pricing. You may sign up and use the special pricing the same day!

* = SPECIAL ORDER; 100% deposit required

** = while supplies last

*** = specially marked tanks only; selection may vary during the sale

Aquatics Unlimited | 3550 S. 108th Street | Greenfield, WI 53228
Monday-Saturday 10:00 a.m. - 9:00 p.m., Sunday 10:00 a.m. - 6:00 p.m. | Phone: 414-543-2552 | Fax: 414-543-4929