Why are you using Jack's classic? Get a 25lb bag of Jack's Professional 5-12-26 and a 25lb bag of Cal nitrate. For under $200, you've got enough nutes for several years and all the calcium you need. 3-2-1 formula from veg to chop, I've grown thousands of plants and hundreds of strains, never once have I burned a plant or had a deficiency/lockout issue with the 3-2-1 regiment. And nothing else, I ran into a problem when I started using Kelp and other organic amendments. Just 3-2-1, that's it, don't fuss with it.