Anon is right on the money, I think. A strong clue is the phrase "leggy plants". I only dose my tank with nutrients/fertilizers perhaps once every week or two (I have a lot of fish). I also have a number of Amazon swords that I know consume a lot of nutrients. But you know, I've become a bit disenchanted with high tech tanks myself. You can have a beautiful planted tank without CO2 and high intensity lighting. It just takes more time.Hi @Captain Ahab
My suspicion is that the problems you are seeing are caused by excessive light and excess nutrients/ferts. I don't follow the EI Method. I prefer to minimize surplus nutrients in my tanks. And that means measuring nutrient concentrations using water tests. For me, that means nitrate and phosphate followed possibly by other tests. Some people prefer other approaches - whatever works for you.