Moisture Trays????

[mayres]

I use long plastic trays 6X24 or 6X30 that are sold as pot trays for window boxes. You can find them, among other places, at Lowes, Home Depot and like places. I fill with pea gravel. By using a hygrometer I've noted that it raises the local humidity around my plants by about 10%. As noted - just add a few drops of bleach to some water when you add it to the trays and this will clear out your algae quickly.