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Always keep your flasks in a clean area away from your orchids. Dust mites can enter your flasks through any vents and cause fungal contamination. This will show as a white layer on the medium. The fungus may cause all the seedlings to die.
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Dave W
"It is easy to grow orchids - you just have to think like one!" - Unknown
Always keep your flasks in a clean area away from your orchids. Dust mites can enter your flasks through any vents and cause fungal contamination. This will show as a white layer on the medium. The fungus may cause all the seedlings to die.
This is a hard lesson to learn. Looks to me like you might have moved some of the seedlings out earlier (I have 20/20 hindsight, by the way )
I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)
I wish! I would have hundreds of them! That hobby flask was a purchase from a vendor at a Canadian Orchid Congress show and I did not notice that the container had a hairline crack.
C. dowiana is one plant that I am completely captivated with. Plant availability and cultural success has proved to be very elusive for me. Fortunately I recently received a larger plant from Ecuador that adusting well in my conditions.
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Dave W
"It is easy to grow orchids - you just have to think like one!" - Unknown
Flask Contamination FYI
show's others how fungus does not sleep 
. I'ts like no signs one day next day 'oh my gosh'...
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