I've had my 55G tank up for a month now (started the cycle with some ghost shrimp and a couple of hardy danios), had my ammonia spike, nitrite spike, and have had 10ppm Nitrates for 2 weeks now. I added fish (in moderation) last week after the ammonia and nitrites reduced to near-nothing and the nitrates were stable and low. The water was fine all week, I tested it every day and then today I get these scary readings:
Ammonia between 2-4, and Nitrites at 5!
I have Prime, and was going to use it to detoxify the Nitrites and Ammonia, plus I was going to do a 50% water change, but I also wanted to know what you all might suggest if you've experienced a sudden spike like this.
Luckily the fish all seem to be fine at the moment, but I am worried about them.
Thanks in advance for any advice.