I can get the HR part down pretty low cost wise but that OSA28 is $1,100.00 per gallon and I use .36 gallons per room per 9 week cycle so it adds up quick. The Veg & Bloom, I use roughly 25lbs pre 9 week cycle, Size is about 6lbs per 9 week cycle, and Life is only about 150gram.. I mix 35 gallon...