Hell yeah I've had a mixture of MC and water for over a month and it's really stable. I just give it a little shake the only sediment is like what would be at the bottom of an ice tea.It smells like molasses and a tsp makes a gallon with EC of 800. I throw a cup in my res. and the PH is always btwn 5.8 and 6.3 with EC1- 1.5 been adding calcium nitrate during veg and i noticed the new newish 2 part of megacrop has for part B just straight up calcium nitrate..nice to know ...Ive also been adding humic acid and kelp blend for veg.i plan on using just Megacrop once i switch the lights. No more high phosphorous.