my setup & questions DWC/BUBBLEPONICS

this is my first grow ever of any kind of plant and here is how my setup goes.

my cabinet first is an old pantry which measures 160cm tall in height from the inside, looking into it from the front to the back is 56cm and from left to right 43cm,
in the cabinet i have 4 x 120mm computer fans(70cfm) one in each corner, 2 for exhaust and 2 inlet connected to fan controllers so i can control the speed of air coming in and going out which will help me get my humidity right

up the top is my reflector with 250w sunbrite 6400k light,250w sunbrite 2700k and 48w 5000k light, all these lights will be on at once since i'm growing auto-flowering seeds first to get a feel for how DWC/bubbleponics works before i start growing different strains.

the lights will be on either 18/6 or 20/4 hours cycle, whats your opinions?

at the bottom is my tub with 5 pots(clay pebbles and rock-wool) in it is
2x 12" air stones running off 200L per hour each total of 400L per hour which will be running 24/7 and a water pump feeding my 5 pots, this will be running on a cycle which is 3 times a day for 1 hour each session which should get my roots time to dry out before getting flooded with nutrients again.

the nutrients i will be using is general hydroponics flora grow, flora bloom and flora micro and super thrive

they will be fed only water and super thrive for the first couple of days till they start taking off then i will be then will be feeding them flora grow and micro at 1/2 strength for 1week then full strength the 2nd week and full strength the 3rd, i will then switch to flora bloom and micro for the remaining weeks up until the last where it will be only fresh water to flush them..

that sounds like my setup down pat, i need opinions on things i should be doing differently or does this sound alright? at the moment i'm waiting on my lights which dont come till 12th of august before i start this project, i will be posting pictures and guides on what i have done as soon as i get my lights, need feedback and opinions peoples

also the first strain i will be growing is ruderalis indica weak i know but they seem to take a beating a grow in almost any condition, i do not plan on smoking any of this from the first crop but instead turning the whole lot into hash since i know this plant has very little THC and i might as well get the most from what i got...
 
That's not a DWC system. That's an EBB and Flo system with air bubbles in the nutrient reservoir.

Everything sounds fine but 500 watts in a cabinet is going to get really hot. What are you going to do to keep the temps down? Are the hoods going to be air cooled?

Get a TDS meter and make sure you are measuring the PPM's of your nutrient solution. You will also want to get a PH meter I strongly recommend that you get a digital unit which will allow you to have much more precise control over the PH. If you don't do something to keep the temperature down inside of that cabinet I have a feeling PH is going to be an issue.
 
is the 4 fans pushing a total of 140cfm in and 140cfm out not going to be enough? if it really gets too hot ill just add like another 4 fans or something..ill do a dry run anyways with just the fans on and lights and see what temps i get and work out weather or not i need more cooling
 
I don't think 4 computer fans are going to provide adequate cooling in that space. You can do a dry run but I hve a goodfeeling your dry run is going to confirm my concerns.
 
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