I just wanted to comment here about the odd thing I have going. I have 9 orchids, some phals, some oncidiums, 2 masides, and a mini phal, and all are on the same glass sheet, on a heat mat together, under the natural LED lights from Orchid Web. I was told months ago that these plants can't be grown under the same conditions, as they all require different things. But low and behold I have 4 of the phals and 3 oncidiums all going into spike.
I should mention here that they are all in S/H, and maybe this accounts for the sucess. Each one has been putting out new leaves and bright green healthy roots for months now, and this morning I noticed another oncidium beginning to spike. I flush them and then replace the old water with fresh water with Ray's fertilizer (can't remember the name) every Sat and Tues, (sometimes I go till Wed) and once a month I use a touch of rooting hormone in with the food. Anyway, what ever, it's working. Maybe in future I'll encounter problems, but for now, they're all happy under one regime!