Mick your Phals are gorgeous,
I've been looking at some flasking sights including yours, and I've
never come across
Phalaenopsis var bowringiana alba (Misty x alba).
Is it a rarer variety, or is just violacea var alba?

Ray, I also wanted to know, your domes, they don't appear to have some
kind of open or closable vents, could I just leave the domes off the
trays for about an hour a day, to accustom the seedlings to a lower
humidity?
What about ideas for Air circulation?
Thanks
-Sandra