phosphorus problems any ideas

hello all ,i have a 5x5x7 grow room with 400 watt MH light ,6 in inline carbon filter and exhaust ,i run 2 fans and my room average 65 f to 75 f -humidity 42 to 55% .have fresh outside air intake , iv'e got 4 don't know what plants going right now they are 6 in tall .i started nutrient feed program with first set of 5 finger leaves pop out ,i have feed them twice now at 1/4 strength of blue planet nutrients ,i also add additives in this order 2 ml silica ,2 ml cal mag ,2 ml clone tek ,1 tsp black strap .i feed water 2 times feed .all kinda shit going on here my plants seem happy but they have a slight pale green and not so soft texture about them ,i bought a P H tester for my soil to see were the problem might lay ,what i came up with was soil PH 7.0 , Nitrogen N2 adequate , Phosphorus P4 surplus , K potas K2 adequate .every thing but phosphorus is ok . Im growing in Pro Mix - Fox Farm Ocean Forest 50/50 and added Perlite . Does anyone have any suggestion on how to get that phosphorus in check or does it matter .The chart for soil was 5.8 to 7.2 any suggestions ,i would appreciate your help

Phosphorus deficiency is most often manifested as purpling of the leaves, particularly the leaf veins. In severe cases the whole plant may take on a purple hue

your plants look fine to me i'm using blue planet also
Phosphorus deficiency

The Ocean Forest should feed for 6 wks.

thanks i just got that one that throwing me ,do use the nutes at chart levels ,first time i feed them man in a matter of ten minutes those things were almost on there sides .i very quickly flushed them took 2 days for them to stand back up.the reason i wrote the thread is believe it or not i planted them 12 25 14 it's been a hell of a ride .it has been so long since i grew i took some bag seed to start with when i get this project leveled out ,i got some bubblious from nirvana i'm going to give a try

Diabolical666 said:

The Ocean Forest should feed for 6 wks.

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so are you saying i should just R O water them.

yeah, they look great. Are they a little yellowish or is that the light?

no no yellowing just slight pail green in bottom growth green top

old shol4evr said:

so are you saying i should just R O water them.

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if your using ro water use calmag i use one tsp in one gal. gives me about 200 ppm's then add nutes 1/4 small plants veg.. 1/2 bigger plants flower

edit
i use Pro Mix hp

yes i'm using 2ml cal mag ,2ml silca ,2 ml clonetek ,1 tsp black strap then 1/4 nutes in week 2 grow chart

old shol4evr said:

yes i'm using 2ml cal mag ,2ml silca ,2 ml clonetek ,1 tsp black strap then 1/4 nutes in week 2 grow chart

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their grow chart bad ass http://www.blueplanetnutrients.com/index.php/nutrient-calculator
does any amount you enter

terry , were did you get that chart from .mine is nothing like that my first and second week is 2.5 not 25.o ml and so on all threw the chart your's has massive amounts compaired to mine .have you been feeding with that chart and are your plants still alive .when i bought mine they sent feed chart with it for the elite series ,nothing like that ,mine also doesn't have anything in it about root magic other than sprinkling in hole for transplanting