Well if you all remember my threat on the Tetra Aglae Clear or whatever killer stuff that is. My tank is still trying to cycle. After that experience
ammonia hovered at .25.....now is going to 1.0 Tank was totally stable up to that point!!!
Water changes, water changes, water changes....
Fish are actually acting perfect....weird but nice....no damage yet.
That tetra stuff is hideous!!! It is lurking around...watching, waiting...then strikes out with whatever it really did. It sure does kill algae, for a bit, and then gets hungery and tries to kill everything else. It is stalking my tank.
Killed the java moss in that tank too. Luckily I have it growing everywhere else too.
The evil liquid from Tetra....living death...beware my friends....it haunts the
LFS and Internet...watching and waiting....its is looking for you too.
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im sorry ted 
....run some fresh new carbon (even if you dont use it normally) for a few weeks...goodluck with the water changes...been there a few times myself ...!!!