Jimmy... said:He laughed at me saying "you need to get rid of ammonia, not add it.......".
Probably he haven't heard about fishless cycling. I would probably have laught at him when trying to sell me some bottles B)
If the stuff you bought is only ammonia (nothing else), you can use it too. Ammonia level should be 5mg/l when cycling tank. It's a optimal value. When tank is cycled, then change lot of water to get rid of ammonia before putting any fishes into that tank.