KLN vs Kelpak

[NewBloom]

I'm planning to transfer a cymbidium to s/h this week. While it's not the optimal time (no new leads) this is the growing season. I've got PrimeAgra soaking in water and want to add a growth /rooting stimulant to the pre-soak to help encourage a succesful transfer to s/h. I plan to also use the stimulant additive in the reservoir mix for the first week the cym is in s/h.

I have both KLN and Kelpak on hand but I'm not sure which product is best suited for my situation.

When is KLN the better choice or Kelpak? If Kelpak is good for a PrimeAgra pre-soak and newly transferred orchids then what ratio should I use?