you are in coco, so probably less pronounced. they just grow faster and eat less, it seems.
i would start as you normally do, but any hint of darkness, give a pH-only irrigation and it'll dilute back down no problem.
i don't know what kinda ppms that system puts out.. but as long as it's fairly normal, you shouldn't have to worry too much.. often times the instructions can be for optimal conditions or just plain bloated. if ppms are 600-800, its probably mild enough.