Ok I posted on sps keepers looking for help on coral RTN, nothing seemed to stop the RTN from happening. All water parameters checked out fine. We just moved 2 monthes ago, moving the tank was a nightmare. Anyways we moved all tank water. Corals color came back quickly and I thought everything was fine besides my back. So I started to think what has changed, last week I used the last of my old R/O salt water. The new R/O saltwater change was done 6 days before the RTN. I also notice some dead crabs. I drove down to a local pet store and grabbed a copper test kit, the only test kit I had run out of 
The copper in my tank is through the roof, I drove down to my work and picked up 100 gallons of purified water and did a big water change. I have a stage 4 R/O auto top off system, I'm sure there are a ton of opinions on othere brands, but the point is that copper still can sneak in you system. It's amazing one small thing can cost me corals.
The copper in my tank is through the roof, I drove down to my work and picked up 100 gallons of purified water and did a big water change. I have a stage 4 R/O auto top off system, I'm sure there are a ton of opinions on othere brands, but the point is that copper still can sneak in you system. It's amazing one small thing can cost me corals.
