Your waisting your money and time if you buy
no explode, and you have already went through tubs of
superpump.
The people at the store told you correct, superpump is a bit "stronger" than no explode, and does seem to last longer than no explode. Take more than a money off, or if you want to, throw in a few more scops, you'll be a mess in bed though (with sleeping).
I would just take more than a month off of it, then try it again.