So i took some water from my Piranha tank to petsmart and got it tested, my ammonia was SKYHIGH, the girl asked why my fish wernt dead. Few weeks before i got fresh carbon and added that, and added new filters, and my water went cloudy again. It never has been clear but this time it got really cloudy, so i just thought that was why. Well she said i should get these 2 chemicals, API Ammo Lock, and Prime that removes Chlorine, Charmine, Ammonia, and detox Nitrite and Nitrate. also provides slime coat. I added what it said to add to 120g of water and watched tv a little bit, than went to bed. The water looked ok but when i got up in the night, it had a bad oder. Thought it could be the trash can but when i got up at 9am the apt reeked of sulfur. Any ideas on how to fix this? I had done a 30% water change day or so before i used anything.