I have no personal experience with Joes Juice - I've heard/read good things about it tho...
If it were me (and it was... at one time) I'd wait for the cycle to finish - you probably only have a week or two more. If you wanted to inject them with something closer to "natural" and kill them you could mix up a kalk
paste, or lemon juice, or even HOT water and hit them with a syringe.
As for the # of Pepps. I put 5 in my 90, but you could easily go up to 10 - depends on how much $ you have to spend. They don't add much to your bio-load.
If possible, ask around other Reefers locally and find someone who has had success with Pepps, then buy from the same dealer/lfs
that they used. Occasionally Pepps are mislabeled (actually camelback shrimp) and camelbacks won't help you at all.
Good luck with it - Aiptasia is a pain, but it is not the end of the world some folks make it out to be - This too shall pass.