Becca;
Are you sure it's not algae in the pot? I developed algae growing on the inside of my containers and on the outside of the Prime Agra when the sun got brighter this spring/summer.
I'm thinking of putting my containers in a cache pot or maybe putting some fabric around the outside of the containers with velcro to keep the light out.
In the mean time, I unpotted a couple of my worst looking containers, rinsed the PA, washed the container and repotted with no ill effects.
Cheers.
Jim
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