- Location
- Mt Sinai, NY
Is it all SPS RTNing? What types? Are they Mariculture/wild?
Losing color? Are they going white or brown?
Losing color? Are they going white or brown?

Bella you just set this tank up correct? Did you add new sand to it? SPS like a well established tank for the bacteria to accumulate and even though you added old rock it still a new tank. Im sure its new sand as well. You can try to add some different strains of bacteria like microbak7 and other brands. Mix a few together. Also your going to need to slow down on a large water change. 20 gallons on a 60 is alot unless you matched the Alk exactly to your tanks Alk, All these things are playing major roles in the STNing. Honestly I would try and see if someone can hold them for you to see if they can nurse them back to health and wait a few months until you start seeing some nice coraline algae growth and get something to keep your parameters in check
