Thank you Karin for your help!
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Thank you Ray for you help on all orchid forums, you always offer great advice.
actually for my phals that have suffered root loss and transferred from S/H to FWC, I only have about 1/4 th of the root mass in water, approximately the same amount of roots that grew into the reservoir while they were in the S/H setup. Hopefully the transition would be smoother than the ones being moved from bark to FWC.