I purchased these for one my project having a perfecf ph level really dose make a difference the packaging came perfect because i was originally scared they will come leaking or just old like all the nutrient sitting in the bottom like stuck or like in clump but nope it came perfect and i shook it up couple times poured some in a bowl ph test it and it was exactly what i needed and my plant sky rocketed it one the best ph balance nutrient i ever purchase and would deff buy again for my next project great nutrients