Semi-Stealth Cabinet T5 DWC SCROG Technaflora

Well here we go. This is my first attempt at hydro, 3 grow attempt total. My first two grows were single bag seed plants, each turned out to be male. This time I'm doing it right, with a few feminized seeds from Attitude.

Heres the setup:

Old wardrobe cabinet, gutted, and lined with 6 mil Panda-Film

2' 4 tube Sunleaves Pioneer Jr T5 with grow bulbs. (bloom will be used later)

10 gal Rubbermaid bin, covered in metal tape, with net pots.

Dual output fish-tank pump running to 2 8" air stones.

PC fan output vent with custom built carbon filter

Passive intake holes in the floor, and in the rear of the unit.

Seeds: 2 x Phatt Fruity Femized
1 x Arjan's Haze Feminzed
1 x Northernlights x Skunk Feminzed
1 x Morning Glory Feminized
I am going to be using the TechnaFloura Recipe for success nute kit.

They are just seedlings now, 5 of 5 seeds sprouted. I put them in the net pots 2 days ago, no roots howing out of the bottom yet.

Ill plan on no nutes till the 3rd of 4th set of leaves, than start at 50%.

Thanks for looking, and please give any advice you see, as I am a rookie.

How fast will the ph fluctuate? Do i need to adjust it multiple times a day, once a day or less?

Well I switched to distilled water, seems like the PH is holding better. I started nutes today but kept it at 1/4 strength. Gonna start building the screen pretty soon. pics will come next week

PS. Please feel free to post any tips, advice, or feedback.

Roots are getting a little brown, but it rinses off in water. Maybe a little algae. Im going to try a little H2o2 and see if it helps.
Also drained and filled tanke yesterday, and moved up to 50% nutes. Everything is looking good besides the brown.