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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