I'm a little lost for words here... Just got our 150g FOWLR all cleaned out and getting ready to make it into a SPS only reef. So then I got to checking all the various levels to make sure it was all stable before I added corals. Everything was within range of where it should have been except Aklalinity. The test results are as follows:
(All salifert tests, except the Specific gravitiy)
Calcium: 420 (good)
Phosphates: 0.03 (good)
pH: 8.2 (good)
Specific Gravity: 1.024 (good)
KH/Alk: 22.7 (Roughly twice what it should be)
The tank currently has no corals, but it has had several fish in it for a little under a year. Recently sold off all the fish that would eat any invertibrates, so we got a dozen each of nessarious snails, red legged hermits, and margarita snails. We also got a fighting conch, tiger cowery snail and a sand sifter star to boot. All are doing really well and don't seem to be stressed from the massive KH, but I'm pretty sure we'll need to have it lowered to switch the corals. I read in an article that giving the tank better airation should help lower it, but it hasn't really helped. The tank is running an algea scrubber, protein skimmer (ASM) and a UV sterilizer which is blowing a stream out of the water to help make waves in the sump (I think the tank is pretty well airated). If anyone has any ideas for how to lower the the dKH or input as to why this might have happened, I'd love to hear em...