Why the hell do my sps keep dying

[Skimmerking]

Originally Posted by Red Coral Aquariums

The only things that jump out at me on your parameters is the low salinity (I would recommend 1.025 or 26 and due to the fact you have not tested for Mag. Here is an article that might help.
http://reefkeeping.com/issues/2006-07/rhf/index.php
Kevin

Kevin I disagree with the low salt in the water, I know of some
pepole that have a 1.22 tank and their SPS is awesome, I keep mine at 1.023 and i have no problems keeping SPS. if your MAg is really low then that could be the problem , but if you are doing water changes every 3 weeks then you are probably getting enough Magnesium. unless you are dosing KALK at a high rate which would cause the Magnesuim to drop