Turn over in tank too much for filtration? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 2 Old 06-02-2010, 05:52 PM Thread Starter
Turn over in tank too much for filtration?

I was curious if it's possible to be overfiltering the water in an aquarium, and if so how much is too much?

Currently I have a 55 gallon tank, and the return pump is 295 gallon(with very little resistance so I doubt it's very much lower than that number) but as far as I've read, the less than 6x an hour turnover rate is okay, but barely good enough if at all, and I would also like to re-arrange things, so I would lose some pressure and that 295 would probably go down even lower, but since I'm trying to keep all of my modifications and spending to a minimum, there is an apparently great kit to make my maxi-jet 1200 boost from 295gph to 1600gph, but I figure even if I put a load of 90 degree turns in there, it will still probably be too much filtration at that point, but I was curious if anyone has a differing opinion on this.

The tank is a 55 gallon that will be home to a small number of common/comet goldfish, it will be set up with a very large spraybar on the return(so plenty of water can go into a large surface area to avoid just having a massive stream)

Does anyone think that 1400gph(I would guess I would be cutting it down to, no scientific basis of course) might be in a possible range for the tank to still be healthy, or does anyone have suggestions on a good pump/powerhead as a return for the 55 gallon tank that would be in a not so expensive pricerange, and a good flow rate for the tank?

As usual, thanks for any help in advance.
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post #2 of 2 Old 06-02-2010, 06:23 PM
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The answer to your first question is, yes; it is certainly possible to have too much flow for efficient filtrationn.

But that's all I'm going to write. Filtration should in my view always be geared for the fish in the aquarium, and different fish require different water movement both for the issue of filtratio but also for the good of the fish. You mention goldfish, so I will leave it to one of the many "goldfish-knowledgeable" members to comment on appropriate filtration for these beauties.


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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