rr are by far the best starter plugs to use, i think the rocwool drys out to quick and u have to be careful as to soak them in ph'd water, and they are just to much to deal with. now rr on the other hand works real good iv'e had near 100% success with them. the key is not to soak them but to keep them damp as with any other.and i germ my seeds by starting out soaking the rr in ph'd water 5.5 for 1 hr then i shake off the excess water to make the rr damp not soaked, then i take my seeds 1 in each plug then i tear a lil off the side of the rr to plug the holes in the plugs where the seeds go.

then i put them in my seedling dome under 2 cfls 150w each for 18/6 and in about 3 days i have sprouts now sometimes like hydrohut said i have to open the top alil and help the seedling by turning it the right way as sumtimes the plugs are alil tough and the root can't break through other than that no probs but thats just me i'll never use rocwool again