Hi all, I'm a newbie to this forum. I look forward to learning and contributing here!
Dealing with a fresh fill and high iron content. The 20,000 gallon pool was filled with one garden hose at half throttle over the course of 2 weeks through an iron filter that was regenerated every 600 gallons. Roughly 100 oz. of Sequa-Sol were added over time as the pool was filling. After the pool was filled the pH adjusted from 7.8 to 7.4 and the filter was started, pool was shocked with calcium hypo. Of course, the water turned dark brown. Why wouldn't it?
After talking to GLB tech yesterday I'm confused. I've used Sequa-Sol for years in customers' pools for spring openings and top-offs with the idea to reduce or eliminate staining from minerals in makeup water. GLB tech tells me that Sequa-Sol won't remove iron and minerals, it just keeps the molecules in solution so they won't precipitate out with chlorine. So - you can't see 'em but they stay in the pool water. Oh, and this doesn't necessarily "prevent" staining. The pool operator needs to continually add the product in order to keep the minerals from precipitating. HUH?
So. Here's my questions:
1) Does a sequestering agent like Sequa-Sol aid in stain prevention once chlorine is present?
2) With a pool’s fresh fill where sequestering agent is added before chlorine is added, then a day or so later, chlorine is added - After the chlorine precipitates iron into suspension and the water turns brown, does the sequestering agent “lock up” the iron molecules somehow so they’re not able to stick to surfaces and stain?
The pool is clearing up after three days of running and many cartridge cleanings, lots of iron settled out to the bottom. I'll vac it to waste and - gasp - add more water. ugh