It's been quite a while since I added NEW rock. I did a 15 - 20% water change and put new charcoal in on Sunday, a 30% wc
yesterday and added ammonia detox, didn't feed them for over about 30 hours and still no change in the ammonia level!!
I use tap water and I know that's about the worst to use. I tested the tap water and it came out fine so no ammonia is in it. I have had a very healthy tank until now and actually no other fish is showing stress except the yellow tang.
I guess I have to do water changes every day until I can get it cleared. That seems more stressful to the whole tank though.
I am very frustrated!!