Subj : Dead Fish To : Roger Shays From : Jim Date : Wed Jun 20 2012 10:25 pm Re: Dead Fish By: Roger Shays to mark lewis on Wed Jun 20 2012 05:43 pm > All of the water was changed and the rocks and tank were cleaned with > cool water then refilled tank , let sit 24 hours with running through > the new filters and then brought the ph to 7.0 the only survivor so far > is a little pleko about 1 and a half inches long I'd be interested to know what the water tempature was. Most hobbyists use tap water to fill their aquarium. Unfortunately tap water contains elements that can be harmful to fish. To remove these harmful elements it is necessary to cycle your water using a biological filtration system. Cycling your water means to have your water go though a biological process called the Nitrogen Cycle. The Nitrogen Cycle establishes bacteria in your water and filtration system that is beneficial to the overall health of your fish. This cycle can take anywhere from two weeks to two months to complete. Once the cycle is complete, the harmful elements of your tap water will have been removed by the bacteria established during the cycle, thus giving you good water quality for keeping fish. Source: http://www.ratemyfishtank.com/articles/92 When I had my saltwater tank they stress the most important thing is cycling the tank the proper way. I'm sure freshwater is no different. Hope this helps, -+- Jim Sysop @ Realm of Insanity BBS --- SBBSecho 2.13-Win32 * Origin: (1:154/20) .