Well, I don't think the kalk delivery is the problem the more I research this. The kalk gets premixed, then pumped into the sump, then flows through the fuge then up into the tank by a return pump. So it should be well mixed/dissolved. Someone else suggested I try to get it into more flow so I moved it over. Also by moving it I got it away from a couple LPS that maybe could have been stinging it. Hopefully it will start to look better...