Eheim 2217 set up
My husband just bot an Eheim 2217 canister filter to clean his 55 gallon tank. The tank has turned a seemingly irreversible green water. After setting up the canister - he had some trouble priming & initially was using the wrong tube. Once he figured this out - he got the water flowing through the canister - but the canister began leaking steadily which began to pool very quickly on the floor beneath the tank. He also lost the instructions & so we are at a loss as to what the problem is.
Any help would be appreciated!