Eheim 2213 or 2215 on 20 gallon long?
I'm planning to upgrade my current filter (Aquaclear 50) and get an Eheim classic canister filter. My tank is heavily planted and pretty well stocked with fish. I've read a bunch of reviews on these filters but still can't figure out whether I should get the 2213 model or the 2215. I'm thinking that it would be easier to reduce the flow if it was too much so will the 2215 be fine?? Thanks