Cattlaya violacea in sphagnum

[aerides]

I just received a cattleya violacea in sphagnum. Very much need helpful tips. I have C. dowiana seedling in intensive care recovery after I tried to continue growing it in the sphagnum it arrived in. I tried my best to gauge the happy medium between bone dry and too moist. I was seeing the pseudobulbs beginning to shrink and had no idea what to do. I watered it a little bit more, but not until saturated. Finally, I knew I had to do something and repotted it into bark mix; it didn't have many roots but I think it be okay unless it just decides to croak, but Now This One !
I can't repot it now because it's not in active growth. So I need to keep it going in the sphag for the time being.
Help! And Thanks!