Help with eliminating yellow/brown algae spots

[typebeatmp3]

Hi everyone, I have a question about how to treat the algae that is pictured here:

https://imgur.com/a/DxGSUqS

Here are the details of my pool:

~18k gallons
Plaster
Constant leaves and other debris from overhanging trees falling into pool
Grubs like to drown themselves in the pool

I SLAMmed the pool last week while simultaneously increasing CYA from 10 -> 30. Last time I increased CYA with dry stabilizer was this past Saturday.

Since Saturday, I've kept FC in between the top of the recommended range (2.0 - 6.0) and the SLAM level (12) continuously.
I've maintained pH in the recommended range (7.2-7.8)

What I've noticed about this algae is that it doesn't look that bad at night after I've scrubbed the pool vigorously with a normal plastic brush, but it worsens overnight and during the day. To try and combat this I've scrubbed every single night.

Any tips on how I can get rid of this extremely stubborn algae? Do I even need to bother? Any help is much appreciated!

 

[reggiehammond]

CYA 30, SLAM level is 12. Follow the SLAM Process very closely and you'll certainly defeat this algae. Very normal to kick up the dead/live algae into the water, then find them back settled down once they've not been disturbed long.

Your FC needs to be at SLAM level as much as humanly possible. Don't dose to 12, then check the next day to find it's 2.
Dose 3-4x a day, as much as possible. How are you testing? I hope a proper test kit.
Test Kits Compared

 

[typebeatmp3]

Thanks for the response Reggie. Sounds like I just have to start putting more chlorine then, I had assumed the week of SLAM last week was sufficient but I probably needed to continue it for a few days I'm guessing?

I am doing testing using the TF-Pro test kit.

 

[reggiehammond]

Highly recommend using PoolMath and paying the $7 annual fee to log all results. They can easily be shared through your TFP profile and we can all look at them to see if there's something you're missing.