Easy to use, comes in an homogeneous form, and works every time. I'm liking a lot this nutrient line. Velokelp is empty and there is not a single bottle in the market at the moment, so I will continue using only the base till everything is empty.
Using filtered tap water the ph stays at 5.9 with RO it drops to 4.5 or so, using the 2ml dose that is the most common.