im actually glad this thread was bumped, as im havign a MAJOR problem right now. Last week, the big piece of hornwort went lost color and died. Of course, i wasnt able to get it out before all the leaves and stuff went everywhere. I did my best to clean it all out, but there are still soem shreds in ahrd to reach places....Anyways, 2 days later, i see my java moss, which had been a lovely shade of green for months, turn white..... 2 days after that, my REd tail Black shark goes belly up. He had been the most robust fish in the tank.A day later, my panda cory's start going. Out of the 4 remaining only 1 is left(2 deaths, 1 missing presumed dead)Now im obviously getting worried. I check the water. There is between 1 and 2 PPM of ammonia in the tank according to the my test kit. Ph has also dropped under 7.I do a big water change(30%) for 2 days in a row. No change. No deaths since sunday, but my remaining cory's have been sluggish. The other fish(cardinal tetras, rummy nose tetras, Blue ram, Clown loaches) have seemed fine. A couple of the Danios look a little sluggish, and 1 has fish TB, but i dont think thats related. All have good color and have been active. I checked the ammonia this morning and it hasnt improved. If it is still status quo when i get home, what should i do? Is it possible the java moss is dead and rotting(leaching ammonia into the tank?) It just seems odd that my filter wouldnt have adjusted and filtered it out by now. Im starting to get worred im gonna come home one day to a tank full of 40 dead fish. What should i do? I've posted on some other forums and havent gotten good responses. Thanks alot.