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My pool will be unattended for 19 days in September. I live in Central Illinois. What should I do with the pool while I’m gone? 1. Should I bring it up to shock level the day before I leave and let the circulation system run as usual? It is on a timer. It would run about 7 hours per day...

Algae Questions 1. Where does algae come from in a pool? a. Does it have to be carried in on something? b. Or does it develop in the pool on its own? 2. Are the ingredients for algae always present? In other words, if the free chlorine falls below the minimum necessary level will algae...

I’m near my wit’s end. I’ve been using the BBB method for 5 years and it has been very successful. However, I’m having a problem this year holding chlorine. This is the 3rd time in a row this situation has happened this season. Here’s the info for the latest occurrence: Readings as of 7...

I realize to do the OCLT, I should turn off any chlorine source. Is it OK to leave the pump running all night for circulation or should I turn the pump off also? Thanks

I have a question about water evaporation in a pool covered with an automatic cover. I have an opaque cover. The entire surface of the pool is covered. During a 24-hour period, does water evaporation occur? If so, how much should I expect? My water temp is in the low-80s. Air temp is low...

Do I have the following concept correct or am I missing something? I understand that free chlorine consumption is by a percentage of free chlorine available. For example, I could lose ½ to 2/3 of my free chlorine per sunny day if the pool is exposed to the sun. My CYA level is 40 using the...