Your Pool Will Open Green Next Spring (Here's Why)

If your pool comes off the cover green every spring, that algae is about three weeks old, and it got everything it needed back in October. In this one I walk through what's happening under that cover between closing day and opening day, and why the winter keeps getting blamed for it. If you'd rather swim in your pool than stress over it, I put out a new one every week:    / @poolguyfrank   We'll cover why algae goes dormant under 60 degrees, how a covered pool warms back past that mark in April while it's still strapped down, and why even a good mesh safety cover lets 1 to 2 percent of the sunlight through. Then where the algae food comes from. Leaves steeping through the mesh every time it rains, lawn fertilizer, spring pollen, and in some towns the fill water itself. After that, the chlorine side. Why the shock you closed with reads zero by Christmas, how high stabilizer (CYA) leaves whatever's left too weak to do its job, and why a winter algaecide rated for about 5 months runs out in March on an 8-month off season. Then the four closing decisions that set up a green opening, what to do differently this October, and the one timing change that beats all four. That one has nothing to do with chemicals, and it saves you the shock, the floc, and the cases of chlorine a green opening costs. #PoolMaintenance #PoolChemicals #PoolCare