I calle ace hardware today to see about ammonia. She said they have it in industrial cleaners section. I asked her about the ingredeants an all it said was 10 percent ammonium hydroxide. It's about 1.98 for 32 ounces or something like that. I've read some forums saying it's too strong and will corrode the tank. Also the ace manager told me It wasn't the right kind for a aquarium but he also said he's never owned fish so he's not an expert. It's just ace hardware brand 10 percent ammonium hydroxide janitorial strength. That's what the lady said I'm going to go there today if you guys can confirm it is the proper kind. And what are chealting conpounds? Are they safe for aquariums? Is it ok if it has that In it? How much do I need it's pretty cheap my aquariums 28 gallons and I was going to cycle my brothers 2 gallon.