I rarely even soak nowadays.. 90% of the time I just put the cutting into rockwool cubes that have 8.0 tap water running on them.. really hard tap water too.. 240ppm staright from the tap.. NOT even usable for aeroponics!

one year I tried to grow the worlds largest water mellon.. snappple was having a contest.. my water melon only weighed 3 lbs... LOL
cause I was growing it aeroponicaly and it took me a little while to figure out that my water was HARD!!!!!! LOL

I only use rockwool for cloning.. and seedlings

If I am taking 10 or less clones.. I don't soak.. when i am on a mission and taking 300 to 3000 clones.. I soak....

oh yeah... sometimes when I am not ready to use clones I will purchase larger rockwool cubes.. this way the clones can continue to grow very very WELL... (4x4x2's and 4x4x4's cube)... I will soak these cubes.. because the plant I am puttng in them already has a developed root system!