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Is it necessary to plug the skimmer suction line and equalizer line when draining pool below skimmer with submersible pump? That way u don't lose prime when u fill it back up.

CH has increased over time to 415. At what point do i need to drain a little and add new fill? Water is very expensive where i live. I'm guessing the calcium came from the city water since i only use liq chlorine, acid, backing soda. from pool school; A plaster pool should have CH levels...

Been using the BBB method for 10 months on a new water fill. Over this time the TDS (Total Dissolved Solids) has grown to 2400ppm. Pool store says this is from the liquid chlorine (Liq chlorine has a bunch of junk in it?). This has risen the saturation index to -0.44. Pool store says the only...

Gray Mottling=Plaster discoloration. New plaster 8 months ago. Always followed BBB method. Finally got contractor to take a look at why pool plaster has lots of discoloration. Never added Borate, didn't think it was necessary. Only fill pool with city water. Test water 5x week, 1x month compare...