Just like last year, I now have algea problem at the end of the season.
Have read "pool school" and some posts on the subject, and have a few questions:
- Is it common to have a very low chlorine consumption during an algea bloom? (My chlorine consumption last week has been 1ppm/24h).
- Can algea continue to grow at chlorine levels above "Yel/mstrd min" level? (Last year this seems to be my experience).
10 days ago I saw some algea growth. The water also got a faint plastic smell. Did a normal shock treatment, and thought it was ok.
Today, the bottom and walls were covered by a thin greenish layer. It is very easily brushed off into a browny cloud.
Current situation, before shocking:
CYA about 25
I shocked with about 300g of calc hypo, and brushed the pool. Three hours later I have FC = 16 ppm. 300g should raise FC with 13ppm in my pool. I obviously took a little more, but it seems again that my "algea" doesn´t consume any FC. Is this normal?
Will do the OCLT tomorrow morning.
Here's my topic from last season:
Appreciate any help.