So what do you mean by saying that the trichlor may not be dissolving? I was putting 4 pucks in the floater and they would last a week or so, but I had to add 2 bags do shock in order to notice any testable cl levels. And, as you said, my ph was staying low. Better now using bleach and regular testing. Would using the pucks be am option say if I were going on vacation for a week?