When doing the red sea colors I would go way less than the instructions say to go. As long as you're putting something in the tank you will start to notice a difference IF your issue is the tank being starved. No need to do the complex dosing based off usage. Literally 1 ml of each every other day would do the trick and give you a data point IF that's your problem.
I personally don't feel reef roids does much for SPS, I look at that as acan food.
Your fish are providing the food! The fact that you have recorded levels of nutrients via your test kits no matter how small means you have food in the tank. I'd also recommend a test from a lab.
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