Browning and blackening of leaves

[Zoren]

Thank you all for your great suggestions, it seems that I probably have a number of different things happening at once. I've decided that I will water my
infected/problem plants separately. South Park, I do not have any fungicides (I've had no need for them before). Ray, do you feel that I am killing the microbes in Garden Solution even though I don't use it often or allot of it. I use allot more Garden Solution more often by far. So can you give me other suggestions to help with my problem. I will be keeping a close eye on the plants I've already treated hoping to see improvement. I have to make a correction I only have 75 plants, looking for more. I'm trying to replace a few plants that I really liked in the Species Phalaenopsis family, I'm also looking for Encyclia, maybe some of the Board members can give me good Orichid nurseries to look into. Zoren........