I agree but a zero reading doesn't say much especially on low grade kits. I know corals like bacteria use more nitrogen than phosphorus whether or not there's a perfect number I font think there is but they do need some as their basic needs.
I wouldn't be adding nitrates unless I am carbon dosing and even then it would have to be severe.
Not sure overfeeding will do much besides add more phosphates, upping the bioload will help but if carbon dosing then it's only temp until the denitrifying bacteria catch up.
A zero is kind of a neutral point , are we below zero or are we way below zero , I agree shooting for zero on hobbyists kits is ideal as there is sure to be n and p being used in conjunction to what's being read.
If colors are the issue or even growth then I too would look at other things mainly lighting , totm on RC right now only measures three parameters alk,salinity and phos and his phos is 0.21 so I don't think having it really low is a must as he obviously has no issues with growth colonies are huge and colors are amazing, 400w radiums baby lol
Greg what would make You think your nitrate deprived or do you think that?
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