Algae bloom possible at low end of target FC?

[gonzoTG]

Have been using BBB to maintain for about three weeks. I add bleach to 9 pm and lose about 4.5 ppm / day. Numbers are:

FC - 5 ppm
CC - 0
pH - 7.2
CYA - 55
CH - 150
Alk - 80

I have never dropped below the 4.5 number as per pool calc, but it looks like there is some cloudiness and maybe a faint green. I have raised to shock level but am confused as to why I am seeing this. I also just finished installing a new sand filter which may be just coincidence but I expected my clarity to improve and ended up with a green tint. Didn't think I needed to maintain above the range and target the high end or that bloom was possible at that FC.

 

[Richard320]

4.5 per day is excessive. Green just conforms things.

The minimum isn't enogh now - you need to SLAM it.

 

[gonzoTG]

Slamming away today and vacuuming. No appreciable color change or change in filter pressure. Lost 8 ppm in about 11 hours between this morning and when I got home. I was surprised to see, as I was when I noticed a tint change, that I really didn't have any CC. Thought this was a lead indicator or should see some from destruction of algae. Will attempt to log process through to clear and will add picks when I can figure out how to add from iPad.

I also added some DE to my new sand filter in the hopes that it will clear quicker.