i have a dendrophylia that i got as a gift...i was very new at the time, and still consider myself new-ish. it is growing well, but i think it is different from most in that it isnt photosynthetic at all, which places a greater level of difficulty in making sure there is enough food in the water column but also keeping the water clean. it grows in fits and starts, i think because that's how the food level or water quality goes...even though i like to think its pretty stable!
from what i've learned, they arent open 24/7 but are primarily nocturnal--convenient being non-photosynthetic and all!--but can be trained to come out during the day. (maybe conditioned is a better word than trained)
i started feeding mine when the lights came on, and after about two weeks, he just stared opening when the lights came on.
i have a boatload of red mushrooms, some with a bluish stripe and some without. they grow pretty big--about 3" tall and 3-4" across is the size of the first one i got. i know that isnt what you're looking for (vs a ric) but you're welcome to a few if you'd like.