So a couple day and I should see if it is working? have read places where they would see results starting within hours. I haven't seen that.
Correct. Granules are recommended for algae that is under a couple feet of water or greater, liquid for floating or higher up in the water column. It sounds like a stronger dose is necessary, the liquid Cutrine is needed, or it really isn't algae.
I've seen the FA turn color from green to yellow to almost white (depending on the dosage) in as little as an hour.