Yes I do have flakes in the pool something fierce. I recently did what you said and washed it out but it builds up again quickly. As a side note, I struggle to get my TA at 90 or below due to the fill water TA being so high. I've had it at 80 lately during these photos.Try to wash it out with a strong stream of water.
You should not be getting that build up. Your Poolmath data implies your are staying near 0 to negative on CSI. Watch your TA levels. That seems to increase scale on my IC. Though it should be cleaning itself at Polarity reversals. Are you getting scale flakes in the pool?
Presently I run my SWG 24/7 and usually at 40% until its 90 degrees here or higher and then I bump it to 60% so my FC doesn't drop too low. If it gets to 5 or below then I am at risk to having mustard algae growing behind my light niche. I have to open it up every 10 days or so to clean it out from any weird growth. I'm using the TF100 test kit, all new reagents.I would check your test results of CH and TA. The reaction you are getting implies those data points are higher than you are seeing.
How much do you run the SWCG? Run time and % generation.
I tried what you suggested. I believe my CH is still around 450. My definition of blue and the color this test displays still makes me question it but I stopped my count at 18 then added more drops to see if it would become more blue and it didn't seem to get bluer.For your next CH test.
The sample may turn purple during the test, or go to blue for a moment and then turn back to red/pink. This is called a “fading endpoint” and is caused by interference from metal ions. If this happens, do the test again, but this time add five drops of R-0012 before adding any R-0010 or R-0011L (I use 5 drops of this). Remember to count the initial five drops in the total.
In extreme cases, a fading endpoint may occur even when adding five drops of R-0012 at the start. If that happens, mix pool water with an equal quantity of distilled water, test that, and then multiply the result by two.