algae and chlorox
On another thread there was a discussion about algea on pots. This may not apply to all situations but when I noticed scum forming on the water in the tray on which my av pots stood, I added 1/4 tsp chlorox to a 2-qt watering can and poured it into the trays. I didn't use up the whole can and there was already some water in the tray so it got diluted some more. After a few hours the scum disappeared. I am hoping that the fumes were not strong enough to affect the plants. I'm posting a picture of the tray and its pots.