Originally Posted by Silverfang
I'm not sure, but I think Ammonia 1.0 is suposed to be fatal. If thats what it's reading do a 100% change asap.
Yeah, but that reading wasn't from recently--it was from when OP first set up the tank, I think.
OP, it seems as if you hadn't been cleaning the bottom of your tank. And perhaps that you had been letting food sit down there. Both of those things can cause water quality to deteriorate, so that might be what was causing the problems.
Keep us posted!