- Aug 27, 2021
- 56
- Pool Size
- 10500
- Surface
- Vinyl
- Chlorine
- Salt Water Generator
- SWG Type
- CircuPool RJ-30 Plus
I have a fairly new (less than a year) Nordic Retreat MS hot tub. At the time I bought it, I also bought a Saltron Mini and I've been using that since day 1. A couple months ago I noticed some white sandy particles in the bottom of the hot tub (at each seat, like they're coming out of the vents, and on the floor). I chalked it up to people bringing in dirt to the tub, and figured it would be gone when I did my next drain & fill. Well, I did that yesterday, all completely fresh totally clean hot tub, added salt/calcium/CYA/muriatic acid/chlorine per PoolMath calculations, and let it heat up. Just went to get in an hour ago and there's a bunch of the white sand again (and some darker particles, too). Almost all of it directly below where the Saltron Mini is hanging, but a little here and there in the various seats too. And I can feel some of the grit on the Saltron Mini itself.
Is this calcium carbonate precipitate? Why am I suddenly seeing it now, and in great quantity? The pH was really high after I filled it yesterday, but I brought it right down to 7.5 with muriatic acid before putting the cover on. Is there something I could be measuring and adjusting to prevent this?
Is this calcium carbonate precipitate? Why am I suddenly seeing it now, and in great quantity? The pH was really high after I filled it yesterday, but I brought it right down to 7.5 with muriatic acid before putting the cover on. Is there something I could be measuring and adjusting to prevent this?