So I ordered a canister filter for my 55 gallon, and I'm honestly so confused. The instructions it came with are not very clear. First I have a question, when it says that the first tray should contain the mechanical filtration, does it mean the first from the bottom or the top?? Because I assumed it was the one on top but the picture shows the one on the bottom. And my main issue is that the outlet/inlet attachments can not be secured on the rim of the tank because the little edge that sticks out to hold the glass lid. I'll take a picture to show you more clearly what I mean if I'm not making sense.
If someone could help me that would be fantastic!