HI

I am not even going to attempt to advise you on this, I am the worst cloner ever.
What I have found out while torturing my cuttings was my Jiffy Peat Pellets had a PH runoff of 4.0.
"I needed the humidity dome that the pellets come in also"

I tried for weeks to root some cuttings, finally removed them from the pellets and 4 of the 8 survived.

I guess some people have great luck with the pellets, not me.
I'm not familliar with the Rapid Rooters.

Sorry, I can't help you, but thats my :twocents: