It's very easy., it's very exact. Takes about 15 seconds.
Liquid organic.... If you mean it comes as a liquid bottle then yea. No problem.
It Will be easier then the powders that i use that are hard to keep in suspension.
Thanks. This is what I am considering - http://www.naturessourceplantfood.com/Products/Professional/OrganicPlantFood3-1-1/ Would it need a prefilter before the Mix Rite?