My tank was running really well for about 4 months then I got ick. So I started down the road of lowering the temp and SG in the tank to kill these guys. I also started the Kick Ick medication process. I believe I have put to much in at one time. Now my Nitrates are at the low end of the stress level aound 2.0 to 1.0 . The Nitrates had gone up also and now seem under control. I started a to do about a 20 gallon water change which lowered my NItrate to a safe level. My critters seem happier now. Its been a week since my last water change(Store bought premix ocean water). How do I go about fixing my Nitrites. Do I need to put some new live sand in the tank and let nature take its course or do another water change? How do I get the water bugs to come back also since it looks like they are all dead?????????? HELP !!!!!!!!!!