Let me just tell you how fantastic the change has been. I've been harvesting for 2 weeks now. My back hurts. My wife and I are cranky. Since switching to jack's amidst this incredibly busy, chaotic, and stressful period of time my job of maintaining my plants in the nurseries has been made considerably easier now that I can hold a 32 gallon reservoir for 7 days without a problem. The PH stays stable for all 7 days at 5.8 and requires no further adjustment. With general hydroponic's maxi series I was unable to hold a reservoir at all. That means while harvesting I had to weigh and mix 3 separate dry fertilizers and then adjust the PH every single day. That doesn't seem like a big deal. Let me assure you - it is. It takes time and energy. 2 things no gardener has an abundance of during harvest time. With maxi I was having to dump, clean, refill, weigh more fertilizer, then PH adjust again every 2 days. It was pure insanity not to mention a considerable waste of time and energy. Those terrible days are over! Jack's is stable. My veg plants have never looked healthier. And the tasks of maintaining the garden have become much easier not to mention the reduced stress level. I will never switch to another brand. Jack's is professional grade fertilizer and that's exactly how it performs. Stable, soluble, affordable, and reliable. I'll post pics of my nursery plants later after being on jack's for about 2 weeks. The growth is lush and green. I can't wait to show y'all