Noticed an algae problem scattered along bottom of pool and under ladder.
It is a different color than the algae I have had in past years. More of a lime green. Is this mustard?

How do I correct? Do I need algaecide or will bleach correct?
Should I brush?

PS.....I use the 3 B's

18.000 IG vinyl Sand filter

Here are numbers before and after I shocked.....

Before Shock...........................After Shock
FC 15...................................23
CC 1.....................................0
TC 16....................................23
pH 7.5....................................7.5-7.6
CYA 90...................................90
Alkalinity.................................100
Temp 84.................................82