Hi guys, im new to this forum and have been reading a lot of interesting stuff here. We just moved into a house with a pool two months ago and I noticed some bad scaling on my tiles and stones. I have read pool school and chemistry and I think I got all of the numbers right. However I don't know whats causing this severe scaling.. Note that when I moved in we didn't have this, and its only been 1.5 months..
My water is
FC - 2.0 (its winter here so water is below 55 F most of the time, so I didn't think it needed more chlorine than that this time of the season)
CC - 0
CYA - 40
CH - 420
AL - 80
PH - 7.2 (it was around 7.6, although there were times when it went up to 7.8 to 8 when I moved in, but now its hovering around 7.5-7.8) Reason I dropped it to 7.2 is i'm hoping it'll get rid of some of those scales.
Salt - 3200ppm
I do have a SWG. I have tried using a mix of Muriatic acid 1/5 ratio to get rid of the scale, although it helped it was still tough to get it off, the rocks too has some white-ish layer of I don't know what. Maybe from the water ?
Currently I dropped PH to 7.2 and trying using garden hose to rinse the walls and start scrubbing more often ( i use to scrub the tiles once every two weeks with a nylon brush, but maybe I need steel brush and have to do it three times a week? )
Also does ScaleTec of scale remover solutions from leslies work ?
Any input is greatly appreciated. I also included some pics here ... I do get these white stuff on rocks too, and its usually on the part where water barely touches, not the waterline... So is it scale or efflorescence ? What causes this ? and how do i get rid of it