@meri8181 I have had experience with algaecal Plus for over 10 years and strontium for a short time. It did not do enough for me to just rely on that. I unfortunately had to go to the medicines I might have lots of problems depending upon which one we're talking about. But the algaecal plus I've continued with just because it's a way I can get calcium that doesn't bother me. So many of the other calciums just bother me plus it's good with other vitamins like the k and the D that I find it beneficial.