I've got ricordea in 3 spots in 3 different tanks. One, Elphaba- she's green, is in the middle of my seahorse tank, low flow in the "shade" created by my floating mat (breeds pods for my ponies). That one is my least happy ricordea. The second one, Ricky, is near the very top of my 20 gallon, high flow, lots and LOTS of light, he's very happy. The third one, Jude, was near the top of my 10 gallon, but jumped off the rock pile to the bed and then crawled about half-way up to a spot where there is medium light and not a lot of flow. I think they all like different things. Mine are very hardy and LOVE Coral Vite!
Catherine