Lee.....I've often run without grids while being away on summer trips. One thing it does afford is maximum circulation compared to with grids being in (even after a backwash and/or cleaning). The pressure stays constant at around 13. The most water pressure available comes from the return lines without the grids in.
As to opening "very early in spring" - that's a problem since I have a '20 rescheduled trip in March and another (also rescheduled) trip in mid-May. The Lent / Easter season is a very busy time for me as church organist and director, and so at most there'd be about a 5-week period to work with before the pool would need to be run without grids for another few weeks while I'm away on the May trip. For these usual reasons, I usually don't get to the pool till close to Memorial Day. Earlier just doesn't work with my schedule. One way to look at it I suppose is that longer time before opening=hopefully greater dilution.
As to opening "very early in spring" - that's a problem since I have a '20 rescheduled trip in March and another (also rescheduled) trip in mid-May. The Lent / Easter season is a very busy time for me as church organist and director, and so at most there'd be about a 5-week period to work with before the pool would need to be run without grids for another few weeks while I'm away on the May trip. For these usual reasons, I usually don't get to the pool till close to Memorial Day. Earlier just doesn't work with my schedule. One way to look at it I suppose is that longer time before opening=hopefully greater dilution.
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