07-21-2012, 10:01 AM
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One of the great myths in the hobby is that you need 4x to 10x the tank size in GPH (gallons per hour) flow for adequate filtration. It would seem to make sense since if a little is good, a lot must be better...NOT. What we really want is to filter water more slowly through very fine filtering media that will capture even the smallest particulate matter.
If you think it through, if your filter is filtering the water very well, how many times per hour does each drop need to be filtered. It seems to me that 2x - 4x is more than enough.
Some folks, especially folks with messy fish, use high flow filters and/or power heads to attempt to capture any/all detritus in the tank. I'll admit that a pristine tank may look better, but it's not natural and is often a detriment to the health of the tank and the fish. On top of that, detritus in the filter is more quickly converted to dissolved organics which pollutes the water more than a slow decomposition in the substrate mulm.
But I digress...I suggest using a filter that is rated for the size of the tank. If choosing a new filter, consider a filter that allows you to choose the type and volume of filter media.
Service the filter regularly to remove detritus and use a very fine media in the last stage to polish the water.
edit: One last thought... consider feeding fish less with high quality foods that produce less waste.
Last edited by AbbeysDad; 07-21-2012 at 10:03 AM..