and another quetin is i have a under gravel filter but i change water every 2 month when it will be right ti clean gravel and all thing i change about third part of water ant left only i part behind and i have 110 liter tank and i have 12 fish they all are not so big so plz help and tell me how i can effectively change the water each time i change all the water and wash gravel fish dont eat for few days so i think that how long i should not have to do that ane chane the water
2006-06-08
22:25:28
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5 answers
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➔ Fish