Hi, I'm new to this site and I have already learned so much! #1. I need new water testing kits! I do have a question. I have had my tank for a long time and I don't do a 20% water change unless the tank really looks dirty. Should I be vacuuming the tank on a regular basis? I just got 2 new angelfish, and one died the first night! I checked the water quality, but now I know my test kits are very outdated. The nitrate levels showed low but everything else was perfect. When I add water I always add distilled because I was afraid the hard water would be bad for my filtering system, should I be using this or not? My tap water is chlorinated, is it ok to use this and just add an additive to remove the chlorine? I currently have 1 zebra fish, 1 angelfish, and 3 tetras and 1 large suckerfish? I'm not exactly sure what he is. I have a 30 gallon tank with the eclipse filtering system. Any suggestions and answers from anyone would be helpful! Thanks so much!