Originally Posted by Sniperhank
Don't trust the 'good' answer. You need to get yourself an API test kid to test your ammonia, nitrites, and nitrates. That is the start for that.
Has there been any changes to the system before this happened? When was your last water change? Are you doing 10% weekly to keep parameters in check?
Ok I'll start with that. Should I also buy a test kit for calcium, magnesium, and alkalinity?
There hasn't been any changes except for the live rock I added and the torch coral. I have been doing water hanged 10% every Tuesday. So I'll be doing one tomorrow.