I recently finished my nitrogen cycle in my 29 gallon FOWLR tank. The following readings were stable by the end of the cycle:
Temp: 79.5 degrees
pH: 8.1
Nitrite: 0
Ammonia: 0
Nitrate: 15 ppm
I have about 8 pounds of live rock, 4 pounds of dead rock, 2 clowns, 3 green chromis, and 1 blue damsel in the tank. The tank was stable.
Then, I added my clean up crew a few days ago: 2 peppermint shrimp, 1 emerald crab, 5 hermit crabs, and a dozen snails. I did a 25% water change yesterday. I did a reading today, with the following results:
Temp: 80.2 degrees (intentionally raised)
pH: 8.1
Nitrite: 0.75
Ammonia: 0
Nitrate: 15 ppm
What gives? I don't understand how Nitrite spiked, when ammonia was still at zero. Any help is much appreciated!
Also:
I have a question about doing water changes. I would like to age my water one full day before introducing it to the tank, but how do I get the temperature (which would most like be at a cool 66-68 degrees since I keep it cool in my room) back up to 80 degrees? I do not have an extra heater...
Thanks again!