Recent content by daved525

Thanks. The bromine comes out---& this spa fill goes into the field!

I have a borate pool with SWG, and standalone spa with small, drop-in SWG. My normal practice has been to replace spa water with pool water, pumping spa into pool & vice versa. Simple and fast. I recently did some repairs to spa, and decided to start using spa frog bromine and mineral...

Thanks much--makes sense. I'll backwash in the morning, add more DE & see what happens.

I added DE to my sand filter---enough to raise pressure 1 psi (from 10 psi to 11 psi). This took 7 cups DE---I have a larger sand filter. For the rest of that day, the pressure crept up slowly, as the pool got noticeably clearer---nice! By the end of the day the pressure got up to 18 psi, and...

We just installed a water softener on our pool autofill. We're on a well, and 3 years after building the pool I had to do essentially a complete water replacement, readjustment of water chemistry, along with bead blasting the scale off the tile---alot of work! Softener has dual resin tanks, so...

OK. I think I found the problem. Actual CH was 750, not 290. As posts elsewhere on this site suggest, Color Q can give erroneous CH readings. Taylor titration measurement gave 750. Which would explain everything. Now to exchange over half the pool water... :(

I'm also fighting the dreaded white flakes. I brought my numbers into the recommended ranges, tested with a Lamotte Color Q Pro 7: FC 4.5 pH 7.5 TA 70 CH 290 CYA 70 We are on a well, and water from it tests at: pH 7.9 TA 95 CH 130 I tried driving pool CH even lower, by water...