Hello, my fiancee and I recently bought a 30 gallon tank, and all of our fish keep dying. We checked the amonia level and it is very high, so we have been doing partial water changes for the last few days, about 25% water change a day, we do it by using out siphon gravel cleaner. Our amonia level still hasnt gone down at all. Also we have been testing the ph, and it has been at about 7.6, we are trying to get it to 7, I have used the ph down by following the instructions on the box, 2 drops per 1 gallon, but it isnt lowering the ph at all. We have a cecilian better known as a "rubber eel" in the tank and i have heard that its not good to add a lot of chemicals with one of these in the tank, does anyone have any advise on how to get our tank to a good state? Also if anyone knows anything about fresh water eels, cecilans "rubber eels" please let me know. Thanks- Lindsay and Joe