Is it possible to overdose macro?

[Tigertail]

I have a macro only tank and just got some chaetogro, neonitro, and neophos. I was reading the bottles and the phos in particular stresses to not go above .4ppm (or is it .04? I don't have the bottle in front of me right now). I can't find my salifert testers, but based on the fact that my tank is brand new with nothing to produce waste, I'm assuming it's at or close to 0 everything. If I add too much of any of these nutrients, they'll be fine, right? Prior to adding any inverts or fish I'm going to have this all figured out. I'm well versed in freshwater planted tanks and don't want to just assume they're the same.

 

[cocoReefer]

To a point macro will be fine, but you may fuel Unwanted algae as well