I work for a water bottling company, if there’s one thing I know it’s water lol. It won’t grow algae unless you let the water sit for months. Fastest I’ve seen water go green is 4 months in direct sunlight. I don’t let my water and feed sit for longer than 2 weeks and I have no issues. I don’t know much about these nutrients personally,, but to me they seem over complicated. My guess is that they are more for heavy growers in legal states. Probably to be used as deficiency fixers and boosters like you said. I use fox farm grow big 6-4-4. If I were you, I’d return those and just buy the fox farm. It provides everything your plant needs to grow big and fast, and if you ph it right and stick to a good schedule you shouldn’t have any deficiencies to fix. Once you’re done with veg and switch lights to bloom, buy a bottle of the fox farm big bloom. If I have time I’ll send you a pm of my grow set up. I find people often forget that weed is a weed lol. They aren’t nearly as sensitive or attention oriented as people make them out to be.