Orchid Sanitation Question.

[BrassavolaStars]

Hello All,

I had a quick question. As part of my set-up some of my orchids are in a tray that has a flexible plastic tube on the bottom. Essentially, I water the plants and then the water runs into the tray underneath them to the pipe (the tray is on a slight slant that send the water to the pipe) and over to the French drain.

Essentially, the tray is like a giant saucer with a drain that might have 5 or 6 plants in it.

Could I be spreading disease this way? I am especially concerned as often old leaves fall into the tray which many pants sit in. While the trays are not constantly filled with water and drain as I water, when I water the water sort of washes around all the plants in that tray old leaves and all and may take a couple of minutes to fully drain through.

Additionally, each tray drain drains into the tray under it before the final tray drains to the greenhouse drain.

How bad is this?