livebearerfreak;4549777; said:um i kknow what cycleing is, and my tank IS cycled. and i just tested the water and have 0 ammonia now....
In 2 hours?... A) your initial test was wrong. or B) Your lying.
If your fish are/where flashing, and gasping then it is likely ammonia burn. And your lying. or they have an actual disease, in which case in under 2 hours it is unlikely that the flashing would have stopped. as pointed out quick cure if anything will harm your bio-capacity, and can cause an ammonia spike on there own. Your tanks bio is compromised, thus unstable. Hence it not being "Cycled"
Cycled tanks do not show Ammonia, Ever. Ammonium on the other hand is often not tested for, and can build up in systems that do not receive regular water changes. Temperature spikes in the high 80's low 90's can turn it to toxic Ammonia again. But this is a rare occurence ime.