Considering a PVC
canister filter, but have a question about the pump. The most understandable plans I have seen have water flow via tube from aquarium to top of filter, running through media via gravity, reaching the bottom of filter and then being sent by pump back up into aquarium.
With the pump I'm looking at, I don't know if it's got the juice to pull that off (if I had the money, I wouldn't be doing this DIY
). So I was thinking of submerging the pump and getting it to pump water into top of the filter and then when the water gets to the bottom, the only way out is through a tube back into the aquarium. I know this would be easier with a diagram - sorry.
Question is - will this work, or is it going to be too difficult to get the return tubing to work against gravity? I can set this filter next to the tank, where it wouldn't have to fight as hard, but I think half the fun of a canister is that you don't see it.
Thanks for your help!