Physical clean before chemistry is most important closing step
Pool closing companies throughout Montgomery County follow broadly similar blowout and chemistry sequences on fall closing visits. Very few of them treat the physical clean before chemistry as the step that determines whether the closing actually works through winter. On the east bank of the Schuylkill in Conshohocken, PA, that step is not optional.
The Schuylkill River and its riparian corridor have been depositing organic material into pool water and onto pool surfaces throughout every growing season for every pool on the east bank of the Schuylkill in Conshohocken, PA. As September arrives, that deposit is at its highest rate of the year. The Schuylkill Trail is at its most active in September with cyclists and walkers moving through the riparian corridor along the river.Â
The surrounding landscape is transitioning. The river corridor is carrying the accumulated organic output of the full growing season through the borough. The fine organic particulate, tannins, and biological organic load from the river corridor are at peak deposition during exactly the weeks when closing chemistry is being applied.
Phosphate remover, shock, and algaecide all work against what they are designed to treat but only when the pool surface and water are physically clean before they are added. Applied over September leaf fall and Schuylkill corridor organic particulates settled on the pool floor and surfaces, closing chemistry works against the debris first and against the actual water chemistry second or not at all. On Conshohocken, PA pools from the 2000s at 15 to 25 years of service where surfaces have absorbed 15 to 25 growing seasons of Schuylkill corridor organic material, that pre-chemistry physical clean is the step that makes the rest of the closing sequence actually work through winter.