waterfall

today my aquarium finished filling up and I have started the return pump. The problem is that there is a loud noise coming from my plumbing like a waterfall is flowing. I have tried everything. Slowing down the return pump. Limiting the flow for the drain pipe. Nothing works. How do I fix this...

Hello everyone! I am setting up a new 65 gallon tall reef and I’ve always wanted to do an underwater waterfall in a tank. I’m considering doing that in the corner beside my overflow box, but I’ve always seen these in freshwater tanks. I’m guessing that’s because the low flow in fresh water...