I'll push back against this somewhat. I agree chasing a particular set of numbers because someone's told you they're ideal is futile, however stability is the key and making adjustments to maintain stability is not tinkering. If your dKh is dropping stepping back won't solve it, up your dosing. I've had 2 episodes of dinoflagellates, the first was a tank killer my phosphates had dropped to zero, I dosed phos to bring them back up then just changed water in the hopes that balance would restore itself, it didn't and I lost a lot of coral. The second time again my phos briefly dropped to zero, as soon as I saw dinos I instigated 3 days lights out and started dosing H2O2, within a week the dinos were gone and the tank was back on track. My advice would be your test kits are a window into what's going on in your tank, if you're unsure reach out to a community like this where you will get advice from the most experienced reefers on the planet but sometimes you do need to intervene. Knowing when to intervene is the key and you can do a lot worse than asking here.