Hmmmm. I find that odd as my pars for some of the sps frags are much higher. Radions currently at 85%. I dont have any burning on the tips as of yet; although I have in past tanks. I do have STN from the base on 3 frags, but not gonna chase the problem when all others seem perfectly healthy and growing. I feed heavy and skim heavy.Gotcha... I'm in the 300par range, but still seem to burn stuff....frustrating
I just run the skimmer for export, and a small refugium in the sump with a small dsb, some siporax, matrix for bio filtration with about 30lbs live rock in the main display. As you can see from the picture i ended up installing a UV. Behind the skimmer is my kalk reactor. To the right is my ozone generator that gets fed into the skimmer. The calcium reactor you see is actually double chambered with another same size canister you cant see. Behind the calc reactor is the ATO container. I dont use socks or rollers for mechanical filtration. I use carbon passively in a mesh bag in my sump.Dang...what else do you have for filtration?