Welcome to the board. It is always nice to have Alphamine fans about!
I am reluctant to recommend any herbal diuretics without a specific reason i.e. shoot, contest etc as the effect will be temporary and then you are likely to experience rebound from it.
You are right to drop the Alphamine down to one scoop as Dyma-Retic contains caffeine.
Out of interest, what is your favourite Alphamine flavour? It is a hotly contested subject!
If you have any questions please don't hesitate to ask.