If you want to have problems with nutrients in hydro, then you've definitely selected the right brand. It's really hard to diagnose problems in hydro, individually. But my advice, is that you make a sample switch to a good single part nutrient, and see if it improves. I started with GH, like everyone else, and moved on very quickly. Of particular concern to me, was that the nutrient line didn't seem to be properly buffered, and I would experience some rather wild pH swings.Â
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Contrary to bottle directions - which are designed to keep you buying nutrients - you don't need to switch to any other formulation later, for "bloom".  So look for something that works well in hydro, but also is formulated with calcium. (very important)  See if that improves.