Adequate filtration? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 3 Old 04-10-2010, 08:04 AM Thread Starter
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Adequate filtration?

I will be setting up another large (150gal) fw tank... not sure what livestock at this point. Wondering if I can do well with only a high-end canister like the fluval FX series as my total filtration, aeration and water movement?
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post #2 of 3 Old 04-10-2010, 11:45 AM
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The choice of filter for an aquarium should be based on the fish that will be in the aquarium. Not all filters suit all fish, due to their effect on the bio load, stocking numbers, requirements respecting currents, etc.

A 150g tank of small forest fish (tetras and other characins, rasbora, angels, discus, gourami, most catfish) needs minimal water movement; some specific fish within this group require slightly more current, and it is usually easy to accommodate them within a large tank. And such fish usually require planted tanks, and excessive water movement is detrimental to plants as well as these fish.

On the other hand, a 150g tank of larger fish like Central American cichlids would want more filtration to handle the biological side of things.

All of my aquaria are planted and contain forest fish so a canister rated for the aquarium size is sufficient. In my 115g for instance, I have a Rena XP3 and the filter return is at one end of the tank and I left off the spray bar so a bit of a current is established at that end (it dissipates quickly in a 5-foot tank) which suits the woodcats in the wood under the spigot as they like a current, but the cardinals that do not are happy in the rest of the tank where there is very little movement.

Once you have an idea of what fish will be in your tank, it will be easy to decide on an appropriate filter.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #3 of 3 Old 04-11-2010, 03:02 AM
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I don't like the FX5 on principle. It has a gigantic flow rate compared to its media capacity. For the money, I think you'd be better off getting several smaller canisters.

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