I think you mean hydrogen peroxide. It is the only solution that can rapidly lyse crypto cysts. Please never ever mix bleach and ammonia EVER.
Ammonia is not an effective method due to the difficulty to well the human respiratory system's reaction to high concentrations. However let's use common sense here. Simple soap and water then letting a tank dry for a few days is just as effective of a disinfectant as anything that can potentially cause you harm if used improperly. Crypto cysts don't like dry surfaces and can't survive long so time and patience is going to do wonders.
Bleach that you get for whitening your whites is strong enough kill these buggers and even a 10% solution will do it. The misinformation about chlorine not killing cysts is in drinking water filtration and not high concentrations like using over the counter bleach.
If you don't want to hunt all over town for something, just get bleach, dilute it is you want (keep it 10% or higher to be effective) or spray is straight. Let it sit for a few hours then rinse it clean. After that let it dry for a day or two. Easy peasy and not hard to obtain and use.
If you want to get crazy you could boil your tank but that would just be foolish as you would end up with a cracked tank and a bit of anger.