I am new to Catts this year, some I mounted and some are potted. ALL the plants suffer from shriveled leaves after repotting. I don't think it is a watering issue, so Jerry's explanation of damaged roots fits. In addition, I don't think I have EVER seen a healthy Catt root! Plants I buy have brown, flimsy roots (I'm not sure - is this normal??)and I am starting out in the ditch from the beginning.
birdmom2a2 - this is a tried and true method for knowing when to water all types of orchids. Catts like to dry out completely between waterings. I have huge south facing windows (tinted) and I couldn't get Phals (low light) to bloom in this very bright room. Your supp light will help greatly if the orchids are inches from the bulbs.
Skewer method:
http://www.orchidgeeks.com/forum/orc...f-orchids.html