Tank cycled? Or not yet?

[Emmajane07]

Here are my parameters as of yesterday:
Ammonia: 0
Nitrite: 0
Nitrate: 20 ppm
Ph: 7.6

I added ammonia to bring it up to 4ppm to test that it would all be gone in 24 hours, but it's sitting at about 1ppm still. The ph is at 8.4 as well. I have been using Prime for a water change yesterday to get nitrates down and Stability. Also took my heater out yesterday and cooled to 64 f. Do I just need to wait more? I was hoping to pick up my little dude but I'll wait if I'm not cycled yet.

I'm fighting every urge to use Ph Down and dump the whole bottle of Stability in.

 

[Calgarycoppers]

If you cool the tank too quickly you kill off part of the bacteria bed which is likely what happened. Its a slow over a few days cool down in order to not disturb the bacteria.