I already posted about my ammonia spike under "Broken Heater Disaster". What I need help with now is this persistent high ammonia level. When I first discovered the problem I did two separate 50% water changes and added Prime which brought the ammonia back down to almost zero. I checked this morning and the ammonia was 0.25ppm so I did another 40% water change. Also added another dose of Prime. This evening my ammonia is back up to about 0.75ppm. My nitrates are at zero. It seems like my tank is recycling. I didn't know if I should do another water change so I just gave it another dose of Prime. My questions are: 1. How often can I dose with Prime? 2. How many water changes can I do in one day and how much? (seems like too many won't allow my tank to cycle) 3. How long should it take for things to get back to normal? TIA for any advice you can give me.