I moved an established tank, added 50% new water and tested, all parameters good. I added a fish after a couple days. A few weeks later added 2 more (3 fish total+CUC and corals). Now 2 days later I've got a spike in ammonia, nitrates and nitrites. I did remove 2 snails that didn't survive after being acclimated but the others were fine. I tested my other tanks in case it was the test kit and they are fine. My Ammonia alert says tank is safe (below 0.02) but my kit says NH3
is 1.3, NO3
is 20 and NO2
is 1.6. I did a 25 % WC
and added a bit of Prime and tested an hour later....same numbers. I also added purigen and chemi-pure just after.
So if this is a mini cycle what are the steps to get through it? The fish and corals all look fine.