I don't even agree with stop testing. Each week I get different coral growth and having that calculated it to complicated. I don't know if it's bad testing, but I know it is not steady. That is a dumb statement. She called you out and Erin is correct. You cannot "tell" what needs what, that is a line of crap. You can tell when you need a w/c, but if you go that way I promise you'll have slowed growth and selling your "frags" won't be profitable.