Fertilizing Cycd orchid

[Susieq613]

I was at the Tamiami Orchid Show last weekend and bought two new orchid, a cycd Wine Delight Jem and a Monnierara Red Diamond. They are in moss that is dry like a brick. I heard I’m not suppose to water it when it’s not growing. How do I check the roots without disturbing it to see how it’s doing? Can I run water on it to break up the moss? I have Repotme msu fertilizer. Can I use that at 1/4 strength to a gallon instead of slow release pellets which most people seem to use? I also got a Dracula Jester there. Any tips on that I would appreciate. I never had these fancy kind of orchids before, just the cheap Lowes kind. I have them in my bedroom. I live in South Florida, but I’m afraid to put them out with my other orchids.