This is actually interesting to me. And this isn't meant to steal a thread, but I think its kind of on topic.
I have 4 fish in a 20 gallon QT right now running copper. I have 2 badges, fairly close to the top. If you had to guess, how often should I need to do water changes based on badge results?
I am curious because I haven't seen my badges start to turn green ever, but I do water changes every 5-6 days because I'm nervous and my QT starts to look crappy. Algae covering the PVC fittings and tons of poop. Am I wasting my RODI filters / salt mix by doing this? Do you guys light your QTs to the point algae grows on your PVC fittings?