leaking

Hi all, it's been awhile. I bought a used Eheim Pro II External Canister Filter 2026 a few years ago with a tank and it's begun to develop a slow leak somewhere out of the upper portion above the canister. The leak seems to be increasing in rapidity which makes me think it's time to do...

I have a pond that is around 6 x 5 and around 4.5 feet deep. No idea how many gallons it is. It has a liner, which I accidentally put a hole in it a few months ago. I attempted to patch it, and it was fine for awhile. Since it's been cold, I don't know why, but now the hole is much bigger...

So the tank I just got came with a HOB filter, a millenium 3000. it was working great at her house, then somehow between there and here the power unit came off. In the instructions it says to remove it for cleaning so I reversed that and tried to put it back on. but when I filled it up it...