Using GroDan tray and dome for new seedlings, a few Q's

My seeds have been in the Grodan system for a week and have all "hatched" and have small real leaves. When should I start venting the tray and when and how often should I be misting? Also I have another batch of seed I want to put in the Grodan and am not sure If I should change anything with 2 sets staggered by a week. Thanks!

When you say growdan do you just mean Rockwool? And there in a propagatior ? You want to open the vent now, u don't want it to be to humid they'll get damping off, fall over and die, open it for 2 days then take the lid off..

Sorry, Its rockwool in a dome and the tray holds the rockwool out of the water and let the humidity wick it. Should I open the vents now? What about the new seed i'll be putting in in a few days? Thanks, IDDD

Get the vent open to let em harden off a bit, take them out of the dome completely after 24/48 then put ur other seed in later... What's the system called mate I don't understand... What system is the Rockwool going into?

I Dont Do Drugs said:

Sorry, Its rockwool in a dome and the tray holds the rockwool out of the water and let the humidity wick it. Should I open the vents now? What about the new seed i'll be putting in in a few days? Thanks, IDDD

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Be careful with those domes and lights. It's quick and easy to poach a seedling. I have sadly poached a few. Pull the dome sooner rather than later.

Thanks Guys!
It's not really a "system" per say it's all grodan (rockwool manf) stuff and the tray is a special designed rack that keep the cubes out of the water. There is also a heat mat and the vented dome. I've opened the side vents right now and will open top tomorrow and remove to after that.
Should I turn off the heatmat?
How often should I be misting/watering?
Sorry to be so worrysome but I spent $$$ on good seeds and the last time I did this was 15yr ago in nasty dirt. Any xtra tips would be great.

Don't mist at all mate, i don't use a heat matt ever I did once and it dryed my Rockwool out 2 fast and I didn't see any benefit, aslong as you have a reasonable temperature you'll be fine, don't overwater this is the easiest mistake to make, killed with love, dont try and do to much, let the Rockwool nearly dry then when you water again don't saturate it give it a good watering don't overdo it, give it a squeeze if need be..