ricordea are finicky in how much light they like....ive found that blues and greens do better toward the bottom of the tank, whereas reds, yellows, and oranges can handle waay moar light....
i dont know if you guys use this rules around here, but its a good one:
1) ANY TIME you get anything new, do a freshwater dip. take 1g RO water, mix in 20ml of iodine and dip your coral in it for 5 mins. before you take it out of the dipping solution, shake it vigorously in the water (to remove any pests or disease.) after the dip, put the coral in the shade for 24hrs to recouperate(sp?)....
ALWAYS DO THIS! especially with ricordea and yumas!
Ricordea's, and similar mushrooms carry microscopic parasites called protozoa. if not dipped and killed, the protozoa will multiply into the millions and literally eat the footing out from under the rics/yumas.....yumas are the most vulrenable.
i lost about $150 werth of yuma's / rics to those little bastages...(i thot it was just light bleaching...i was wrong)
jm.o2
also, fyi...yumas in particular, hate bad water quality. it makes them melt.