I don't see why not. The key is to get it dispersed thoroughly and I imagine being pummelled by the return flow would do that. But I've never ever had to add any. My tap water is chock full of CH. I stand corrected.
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.
Welcome to TFP! For a wealth of pool care information please check out our free Pool School. If you are in need of specific help then we encourage you to Register and ask us here in the forum!