Poly 60, borax and algea

[waterbear]

I've noticed the same "sparkle". We really need to quantify this, I wish I had a turbidity meter, we'd determine if indeed the turbidity goes down (hence it also serves as a floc agent) or if the "sparkle" effect is from elsewhere.

Or perhaps the turbidity goes down becase the borates are inhibiting nascent algae faster than chlorine can kill it, thus keeping the water clearer?