Another GHA post - suggestions?

We use Phosban. It does tumble a little. How much should I be using?

 

I am not sure about Phosban, aren't there any directions? I use Pura Phoslock and it recommends;
"For saltwater and crowded freshwater aquariums use 1 tablespoon per 25 gallons of water monthly.
For reef and planted aquariums use 1 tablespoon per 20 gallons of water."

Now, I always add just a little more for GP. You don't want too much as it will "pack" and not be as effective, too little, and the water doesn't have enough contact time. The only thing you should be "seeing" is 0 when you test.