Here’s today’s picture. Just see a little more clear down the side. I think I can faintly start to make out the patter on the liner towards the bottom by the side of the pool.
I might try the DE this weekend. Looks like I will need very little to get it to raise the pressure and from what I can see it’s only sold in 25lb bags. How long does unused DE last?
- Forever if kept dry,
- you only need 1/4c to start, add until your pressure raises 1point (pour directly in skimmer/inlet to pump-filter).
- Then watch for the pressure to rise 25% over clean pressure, backwash & repeat
Manufactures will often tell pool owners to clean their filter when the pressure rises by 8-10 PSI. This may have been ok when pumps were much larger and plumbing was much smaller resulting in much higher clean filter pressures but with the move towards making swimming pools more energy efficient, larger plumbing combined with smaller pumps has resulted in much lower clean filter operating pressures. Under these conditions, allowing the filter pressure to rise by 8-10 PSI can drastically reduce the efficiency of the pump. So to minimize energy efficiency losses, we recommend that you clean your filter before the pressure rises by 25%.
For example:
- 10 PSI Clean Filter pressure -> Clean filter when pressure rises to 12-13 PSI
- 15 PSI Clean Filter pressure -> Clean filter when pressure rises to 18-19 PSI
- 20 PSI Clean Filter pressure -> Clean filter when pressure rises to 25 PSI
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