Those gallons are a bargain! Also, here's some industry knowledge:
When looking at nutrients of all kinds, note the weight per gallon. 1 gallon of pure water weighs 8.34 lbs. When you're buying nutrients, you want the bottle to be as heavy as possible....which means the product was not diluted with water.
Please note that both bottles are much heavier than water alone. In fact, they are the most nutrient dense nutrients on the market! Yup. I can say that, cuz it's true!
As for Growth Energy/Growth Ionic......it's a California thing. They didn't like the word "energy" and made me change it. They were cool with "magic" but didn't like "minerals." Microbes scared the hell out of them and they wanted an extra 1500 bucks yearly if I was to use the word "microbe."
CA may be full of hippies who like their organics, but when it comes to agriculture and fertilizer, Ag business owns and controls everything, so they punish those of us who would prefer to grow with nature.