Okay just got back from the LFS (not a chain) and they said that I should quartine my tetras and my angels in a 10 to slowly get thier KH and PH up and then take my show tank and do a 75% to 80% water change on my show tank to pretty much start over. My current readings are KH<1 degree Ph<5.0 GH=10 degrees. Our town tap is so good that all you need is a Amquel condition and PH buffer to start it and the PH is 8.0 with a Kh at 3 degrees straight out of the tap. I want my tank PH steady at 6.6 for my angels. Is this the best way to fix my problem or do you have any other suggestions?