changing filter types

C

colinman.77

AC Members
Mar 26, 2005
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I'm converting from a sponge filter to a aqua clear for my 20 gallon tank. The sponge filter is cycled, but I don't think it filters the water enough.
My question is, how long do I need to run both of the filters so that the AC can be colonized by the bacteria living on my sponge?
 
filter squeezin's

I suggest taking the sponge filter and squeezing the muck from it into the AC sponges. Then put both back into use in the tank for another day or a week. You could even repeat this several times.
 
I would recommmend running the sponge along withe the AC for about a month or so, depending on your fish load. If you have a large fish load, change water twice as often after you take out the sponge filter for about a week just to be safe.
 
4 weeks is just what I would recommend. It most likely will not take that long, pringing a new filter to an established water environment usually only takes two to three weeks but since your tank is a little smaller I would be safe with 4.
 
I would just leave both filters on there permanantly,there is no such thing as overfiltration.
 
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