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I was told by my pool maintenance company that running with a dry pump won't harm the pump because the pump is air cooled not water cooled. I think he's giving me a line of bull and I need to know how to disprove his theory that you can run a pump without water and not cause damage. My pump is...

I test it with oto drops 5 basic test. I also use strips that show the cya but mainly I have water tested at local pool store. Can I name pool store here? Pool store said to add Cya. I never used to put any in because I have swg for 40k pool and my pool is 13k, so it easily kept up without...

Also, I used to have to add 16oz of muriatic acid regularly every week for the past 10 years. Now pH remains stable or occasionally drops to 7.2 them returns to 7.4 on it's own. Never goes up to 8.2 like it used to. Seems to drop at the same time chlorine is at 0.

Salt pool, 13k gallon, Florida, water at 88 degrees. blue solar cover. Chlorine won't stay. Easy to maintain for past 10 years. Not anymore. Chlorine is at 0 (total, combined and free) Ph 7.4 Alkalinity 110 Calcium hardness 320 Stabilizer 0 Total dissolved solids 4500 Salt 3100 Phosphate 0 4...