For what it's worth I found this recommendation on the physan 20 web-site about african violets grown with a water resivior. "Three fourths of a teaspoon of Physan may be added to each gallon of water used in individual reservoirs. This acts as a fungicide".
For what it's worth I found this recommendation on the physan 20 web-site about african violets grown with a water resivior. "Three fourths of a teaspoon of Physan may be added to each gallon of water used in individual reservoirs. This acts as a fungicide".
While the algae looks rather ugly in the s/h pots, it doesn't do anything bad to the plants. In fact, in my growing environment, I think it actually keeps the pellets moister (is that a word?)for a longer period. I just let it do it's thing, and when I repot, clean the leca and container, and let the algae start over.