Allrighty then,lets move foward.
As for brand names of lighting & or nutrients/fertilizer dont get caught up in that bullshit,people will say they get better whatever out of fancy expensive lights & nutrients vs cheaper models,number one its the expensive light they own so ofcourse they justify,lots of talk about friends having bad experiences with cheaper models,its all bullshit,the lights i reccomended come with a full 5 year warranty & they are the largest hydro shop in the united states.
I own 24 seperate 600 watt digital light systems from HTG,i also own 9 seperate 400 watt magnetic ballast light systems from HTG,Ive had the digital ballast systems over 3 years & the magnetic systems over 7 years without a single problem,i also own 12 seperate 1,000 watt light systems from HYDROFARM that ive had about 7 years as well,had no problems with them either but their warranty is only 3 years i think,hydrofarm is much more expensive than HTG so it just goes to show fancy expensive light systems offer no advantage.
Nutrients need not be expensive either,i highly reccomend using GENERAL HYDROPONICS 3 PART SYSTEM which consists of Flora Grow,Flora Micro & Flora Bloom,no other additives are needed for a grow that could be in high times magazine,its the exact same nutrients i use.
Feeding schedule & ppm,all the shit you hear about hydro being hard where if you add too much of something or not enough of another,or if a pump fails,or any other reason you hear why hydroponics is tricky or hard,all these myths are total bullshit,hydro is way easier than soil.
The reasons hydro is easier is that you the grower is in total control of every aspect of the plants life,in soil growing the soil has more control over plant health than the grower,in soil if a problem develops or plants get sick its trial & error to nurse plants back to health,it can take weeks to see if what your doing to nurse the plants back in good health is even working,then what if the corrective action wasnt what the plants needed to regain health ? The plants keep getting sicker,for a new grower sick or unhealthy soil plants are a nightmare.
In hydroponics in most cases if the plants have a problem its a simple fix,just dump the rez & refill with fresh solution,add a few more air stones & the plants will be healthy again,its that simple,problem solving with hydroponics is childs play & anybody can do it easily.
When you 1st start the plants out you do not want to feed them at all,just plain water with proper ph,once the plants develope 2 sets of leaves you can feed them,keep the ppm at or below 200 ppm,once the plant has 3 sets of leaves feed them 300 ppm,once the plant has 5 or 6 sets of leaves feed them 400 to 500 ppm & you can stay at that level until bud phase,if you want you can feed the plants as much as 700 ppm once the plants have 6 or 7 sets of leaves but lower ppm is safer & in most cases just as good as higher ppm.
Once the plant is in bud you can increase the ppm up to 700 to 800 ppm,depending on the strain you could go up to 1,000 ppm but its best to stay a good ways under 1,000 ppm,as long as plants are healthy keep the ppm no higher than 800 ppm & you will never burn the plants or have nutrient lock out where the plants wont feed.
Ph issues.
The commonly accepted safe ph ranges are from 5.5 on the low side up to 6.5 on the high side with a ph of 5.8 being the sweet spot,keep in mind that these numbers are not carved in stone & plants will be ok if the ph slips past or below normal levels,for short periods its better for plant health & vigor if plants are allowed to see higher or lower ph levels for short periods.
All nutrients are not best absorbed by the plant at the same ph level,an example lets say nitrogen is best absorbed at a ph of 3.5,obviously we cant let the ph get that low because it will cook the plant but we can let the ph slip a few points below 5.5 for a short period it wont hurt the plants & allows them to eat better,the same thing on the high side of the ph scale,some nutrients are best absorbed at 8.5 ph,once again we cant allow the ph to climb that high because it will hammer the plants,again allowing the plant to see a ph of 7.0 isnt going to hurt the plant & short intervals of higher ph help the plants eat better & increase vigor.
So you see ph isnt a hard issue to overcome,as long as you have a quality ph meter keeping the ph in check is easy as pie & anybody is easily capable of doing it perfectly their very 1st grow.
Temps are another issue you asked about,plants are like humans when it comes to temps & humidity,if your comfortable then the plants are comfortable,if your uncomfortable then in all likelyhood the plants are suffering,temps can go higher when the humidity os low.
Plants prefer to be in the mid 70 degree range,for best growth & health i keep my temps around 75 degrees lights on & about 65 degrees lights out in winter,in summer i keep it 75 degrees round the clock.
Humidity can fuck a whole grow up by causing blight & mold,powdery mildew & bud rott,the best way to gaurd against these things is with constant fresh moving air,fresh air is 2nd only to pure ozone in killing mold & fungi.
When plants are in veg phase humidity should be no lower than 30% & no higher than 70%,if the temps are very low higher humidity can be allowed for short periods as long as there is a steady flow of fresh air thru the plants,in bud phase humidity is extremely crucial,humidity levels are best durring heavy bud phase the lower they are,in heavy bud a 10% humidity level is kick ass,in heavy bud a level of 40% is extremely safe,levels of 50% & a tad bit higher are ok but be damm sure fresh air is CONSTANTLY circulating around the entire plant with an oscalating fan or two.
I think i answered all your questions,if not just post with the rest & i will do my best to answer,dont worry about asking too many questions either,helping new growers with very detailed responses is what i prefer to do,im not a short answer kind of grower & i also enjoy mentoring new hydroponic growers get off the ground.
Dont worry,hydro is easy & the hydro section has quite a few excellent growers who answer questions regulary,plus the hydro section has multiple moderators who like myself grow hydroponics & help new growers.
What are you waiting for,get out and start gathering up everything you need to get this grow going.