There are only 2 ways to lower the calcium...either drain and refill with softened water or use a sequesterant that has a high chelation ratio for calcium. These types of seqesterants are called 'Calcium Hardness Reducers' and will require maintenance doses on a regular basis just like sequesterants for other metals do. (Calcium IS a metal!)[/QUOTE]

What is your recommendation for a calcium sequestrant for pools with high calcium?

Thanks so much for your thoughts! I appreciate the time you took to give me details!

Take care,

Shari