Will follow your advice, thank you !....So basically I'm just keeping the full bloom at bay, right? It's just puzzling that the water is clear, yet I still have these recurring spots ...... anyway the dilemma I have is that my family is going on vacation this weekend for a week, so I was going to have to have my father tend to the pool.. Should i just have him follow these instructions? It may be hard for me to explain the whole testing thing to him. ( he may be able to do simple test, but the other one may be a stretch) lol originally I was going to put 4 trichlor pucks in and hope for the best, but now nice I have this mustard algae issue, Im not sure what my best plan of action would be. Thanks again