I have a 30 gallon saltwater tank. Quite a bit of live rock and have live sand. I was off to a good start until now. I’ve had 3 clown fish a Pygmy angel which was sick so I can’t blame the unknown for him. A blue spot jaw fish, a tiger jawfish, a scooter blenny a red dragonet but he jumped out, and a few others but I think I know there cause. My water is in good shape. Ph ammonia nitrite and nitrate. Do weekly water changes and top off with rodi. They will be good at one minute then dead by morning after fine the night before. I’m very aggravated and have lost a lot of money. I have a eshopps nano skimmer a tidal 55 a fluval heater and An ai prime 16hd. I hope you all can help. Greatly appreciated!