How much PP Per gallon?

Kathy wrote:

On the subject of Algae

Only comment I have to add to the others. If your floaters look they they
may be doing poorly, possibly because of all the algae on the roots, you
can float them in a bucket of water with Potassium Permanganate. It will
kill the algae but the roots will be okay, just don't float them too long,
like an hour or so depending on the strength of the PP. ~ jan