Actually it's not hard to clean at all, about every other water change I take out all the rocks and deco and do a good cleaning of the substrate (I have a python that really helps in all my water changing) The pram's are fine, I don't have any issues with the tank or fish other than this new eel and how he was swimming around the tank last night for a bit. I was actually thrilled to see it out because I wasn't sure if he had died in one of the rocks or was just hiding out in them. I just posted this to see if anyone else who has the moray eels has theirs come out and swim at times.