How long does it take a seedling to sprout in hydro? about to open rockwool

I have perfect PPM and perfect PH and temps and out of 8 seeds that cracked when left in water a few days only one has popped out of the rock wool I planted 8 pm Saturday night..... I am half tempted to rip open the rockwool and see whats up

yeah, should have seen somethin by now. theres no action going on with them?

one is almost sticking out an inch, last time I opened the rockwool none survived but could have already been dead, I just really doubt they are growing straight down and just rooting....

yeah I hear ya man, are they soaked too much? I always use the rapid rooter starter plugs. never had a prob.

they have been soaking nicely..