How long can they last? I'm pretty sure that's what's causing my tanks cloudiness. It gets worse than starts to get better then gets cloudy again. It started a few days before I put the fish in; I thought it was all the micro air bubbles making it look cloudy. I posted a pic in the tank forum. \nMy tank is 23 days and I've never had any readings on my tests or the LFS's tests. I've had 2 fish for 11 days now; their doing great. I also have 3 astraea snails, 2 nassarius snails (which I rarely see) and 3 hermit crabs (I also rarely see them). I also added a cleaner shrimp on Fri. ( I caught Biff's post on not to do that for a month after cycling after I'd already had him for a few days) It molted today though and seems to be doing fine and my fish love to fight over him. \nI did a water change last Ths. and cleaned some of the sand and have cleaned the filter 2x, the last being on Sat. (it was fithly too; I might go for 2x a week for now) The diatoms have pretty much gone away and I noticed some hair algae a few days ago on my LR, the astraea snails took care of it. They won't leave the rocks and clean the class which is where I want them to clean. \nI've cut back on the lights to help with the green algae. Other than that do I just wait for the water to clear up and keep cleaning the filter?