humidity question?

OK I have done my reading, or not done rather ben trying to do my homework in threads books movies etc... in prep 4 my first grow which is currently in week three. The only problems or question at the present is regarding humidity and ventilation. My present location is is very dry just outside death valley. Obviously the rh here is round 15%-20%. Every where where i read of the subject is different likely due to the lack of experience in these growing conditions. Now all advise i have read claims that anything over 85% is bad, fine i will never have that problem, but whaen it gets to whatys to low they all vary in advise from 40%-60% 40%-85% to 0%-80%. now the advise claiming that you cant get to low made no refrance to plant transperation as the other two have which leads me to the majority rules right. So by sealing my closet door like a fridge hand watering the plants on the shelf that allows the water pass through and collect into a tray acts if i allow enough run off acts as a humidifier lasting 3-4 days, and keeps it up to 52%or so ok so every thing should be ok sense technically 50% falls into all advise catigories from above figure why question anyone, but just the other day i noticed on a few pieces of perlite in one of the pots seems to have a slight greenish tint. Other than that it is one of my better plants. is this something that i should be conserned with like a type of desiese or something and if so is it contageous or is it due to my improper ventilation or a classic case of over watering. heres some info that may help. mix is 1 part perlite 1 part verm and .5 part peat i also have ben injecting co2 2 times during the light cycle which is 18hrs 8 seedlings no nutes as of yet. plants actually are starting to grow quite fragrant lilely due 2 the lack of ventilation. theyr only bagseed but from a pound of afghani kush which was itself kill. i wish i had a cam but sorry. also sorry 4 all the rambling and yet all this info i guarantee i left out some usefull info oh yeah ph of plant with green is 6.35 and the water when feeding gets adjusted to 6.2

 

Thanks fellas my current temps are a constant 77 in light and not sure bout night temps

 

hey thats some usefull shit wit the trichromes so so probly would be best to vent than ha and instead of rinnong the in and out for the hps thet will need cut mayby cut only one for 1 side of cool tube and set cooling fan sucking air on a timer set to shut when the co2 is set on for 4-15 min intervals probly better would that suffice. and now the temps are cake where i live but summere are 120 min 115 how or what type cooling would yall recomend that would be cheap would one of those 100$ window units cut unto door be best with no vents probly better ha sense i heard that they also draw moisture from air and vent light seperate or this may heat my sleeping quarters tho ha. say if you know if there is some way that i may exaust this heat out my window let me know. shit prob easier 2 get a bigger light move plants out in the room and use window 4 lights and ac 4 cool and move my sleep op to the closet, if the old lady was same size as when we met it would go oh yeah closet door is oposit the window so?

 

shit kill grow i shud set my shit just like that ive got all but some ducting and some ac cause temps are gonna soon rise on me . Hey are those buckets timilar 2 the ones that cost me 50 bucks a piece did u make them if so and 4 how much not including tape what r u an hvac man or sometin jk by the way killer grows u 2 chimera i ben wachin ur shit 2 thanks a mill though should i not worry 2 much bout the green on the perlite on one of my future mother hopefulls.