badfish;2640479; said:First if you changed all your water and cleaned everything and got a new filter you may have a issue with recycling your tank. Test your tap, no ph chemicals you want to avoid swings in ph , test for kh cleaning is not a solution. If you do large water changes you will yo yo your ph that's whats killing your fish.
well I would only add a pitcher of water at a time when I had fish in it. That is normally the amount of water that would evaporate over a week or so. But I only do full water changes in between fish (when they all die). That is why I set up the new filtering system and all of the cleaning was done.
