Hi all, I am having some problems with the Chlorine levels in my pool as it always seems to be too low. I have a ~30K gallon pool and I thought I could shock it and then add pucks to keep the level high, but a few days after putting 4 gallons of liquid chlorine and 6 pucks, the levels are low again. Is it normal for levels to drop so quickly (it has been 90 degrees here in NY)? I've been reading the Pool School and various forums here and from what I gather using household bleach or pool store chlorine is the way to go but how much could I expect to put it in? It seems fairly cost prohibitve if I need to put in 4 gallon every few days to keep the levels up. Am I missing something? The pools looks pretty clear, could I have an algae problem and now know it? Thanks for any/all input.