On Mar 23, 2:21*am, "DEM via PetKB.com" u42059@uwe wrote:
hi i have a question, how often do i have to change my filter ? I have 37
platies, 2 tetras, 2 mollies and a shubunkin which dose not live in the tank
w/ the others. i have a 10 gal with a Aqua-Tech 5-10 gal filter i would like
to know how often i have to change my filter becase i dont think i do it
often enough. how often do YOU change ur filter. THX in advance.

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Message posted via PetKB.comhttp://www.petkb.com/Uwe/Forums.aspx/freshwater/200803/1

With 41 fish you need a larger tank, at least a 50g. The rule of
thumb with tropical fish is 1" per gallon. Depending on the size of
your fish, your minimum requirement is 50g. With that many fish I
would be changing the water at least twice a week and the filter once
a week. I simply rinse off the biobag and use it again (i rinse it in
old fishwater, not tap water). I get about 3-4 uses out of it before
I replace it that way. I check my filter every day, rinse it off once
a week and change it every two to three weeks. Of course, I have
goldfish and they produce a lot of waste, but so will 41 fish in a 10g.