A friend of mine has a vacation rental with a spa ( as I do) and she does not like using bromine which is what I’ve been using. She says it doesn’t work for her so she uses chlorine and so that she doesn’t have to maintain it every day , she uses a chlorine floater . Is that commonly done / recommended with good results? Any time I’ve read up on using chlorine , I don’t recall seeing anything about using a floater.