Nutrient strength

Hey guys an girls.
I have been feeding my plants with Dutch pro for soil a 2 part solution. My plants are in the 3rd week flowering.
My question is when I have been mixing it at the strength it says on the bottle the ppm is only around 4-500ppm. On all the charts I read it says the strength should be between 900-1200ppm. Should I add a bit more nutrients or stick with what it says on the bottle.
Thank you for any help

What do the plants look like? If they're doing good don't change what you're doing.. If they need more, add 10%..

HydoDan said:

What do the plants look like? If they're doing good don't change what you're doing.. If they need more, add 10%..

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I'm a bit in same boat, I use an online calculator for my shogun nutrients, it states my e.c should be 1.8 after add everything but its 1.6,
The plants are nice and green I don't think I need to add more but am very curious if they would yeild more, also curios to wether people back off on base nutes around week 4-5 in coco,

this is my worse leaf I think it is maybe close to max before over fed