Kitty Litter destroys String Algae

very very fine but cheaper and easier to suspend. I have to sprinkle
it over water thru a sieve to prevent it from clumping, and wisk it
at the same time -- just like adding flour to water to prevent lumpy
gravey, LOL. Or carefully use a blender (add the clay slowly to the
water as the blender runs).

Now I'm confused.

First I read to sprinkle it on the algea/water.

Now I read to make a roue of it... and do what with it then?