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If you are dosing EI, run your fert dosage calculations here:

It should tell you how much of ferts you are dosing, regardless what the test kits are telling you. In a high tech, high light tank, it is really hard to get more ferts that what you are dosing. 5ppm of phosphate isn't high. In fact, I need my phosphate level just under 10ppm to keep my GSA in check. You should keep your N around 20ppm. Don't really need to dose K. Don't go too heavy with micros since you can actually overdose it. Keep your iron level around .5ppm.
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