I actually drip 30 drops into abt half a pail of NSW and dip my corals in for ard 15-20 mins at a time. Have to do quite a number of times though so by the time I dip all my corals and LRs in my sump into the dip, I should have finished my entire bottle.
I agree with supporting local LFSes which is why I spend so much on corals at GO, Reborn and Iwarna.
So I guess you will be getting your future prodibio products from ML???