theres many bboards out there. many ppl who respnd say they Didn't like the stuff. But I have not experiance and if it works it works. I would keep using it. But IME I have clams sps and I never had a prob with cal and alk. I used kalk and turbo,buffer when needed. Maintain magnesium= makes sure thats not low. But I just never had a prob. i use a reactor which is the best.