Switching My Tank From Power Filter To Canister Filter?

So I have a 30g set up with 3 oranda goldfish. I want my tank overfiltrated because of how messy goldfish can be. When my tank was a tropical tank I just had a 30g fluval filter in it. When I got the goldfish I had an old 25g (not sure what brand) and a 10g whisper that I added to the tank. The 10g and the 25g have both stopped working and I'm not sure my fluval is running at top condition.
My friends dad has a 60+g canister filter he will give me for free. I think I'm gonna take him up on the offer but I'm worried about loosing my cycle. Should I continue running my fluval filter for a week or so after I set up the canister filter? It has sand substrate and idk if that will keep the cycle like gravel would. Thanks :)
Posted: May 10, 2013

Best Answer

To avoid the tank from going into a mini cycle, connect the canister filter while you still have the power filter installed. Leave the canister filter running for about 6 to 7 weeks then you can disconnect the power filter.
Rohn

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