I would use the solutions it came with, remember you have to mix the freeze dried powder, and the solution gently(you should have a syringe to extract the liquid, and insert it with the powder).Refridgerate after mixing, and use within 2 weeks (although some instructions say 4 weeks), but you should have no problem using it up in a week or so.I also have read that the solution is stable withing 24 hrs. if temps don't go over 80....but I would still stick it in the fridge...never freeze.You also want to store your kit in the fridge, not freezer!!Kits should have exp. dates on them as well as other info on storage.
Peace
PS- tip number 48b, on the small amps if you run a file around it a few times they snap off nice and clean.