The best one I found after trying many are these 5" round and flat disc like airstones. Been using same ones for about 2yrs and they doing fine. Just scrub the stones a toothbrush then soak it in vinegar for 10 mins after each grow. They are perfect for 5g buckets grows.
Stick with Milwaukee or Hanna brand. That ebay seller is legit they are authorized vendor for all their stuff so you get FULL WARRANTY! I bought a hanna growcheck all in one meter from them along time ago.
If you want to keep your plants short and dense use MH for vegg stage. Then HPS for flowering. This will optimize your grow space.
If you have room and don't care if plant stretches out and grow all long. Then use HPS. But your plants will take up more space.
Is your hps bulb mixed with blue spectrum? If it doesn't have enough blue spectrum your plants will stretch alot during vegg. You can get a metal halide bulb for like $30 from home depot but make sure your ballast supports both HPS and MH bulbs.
I was using giesemann T5 HO actinics+ during vegg stage before but not for entire stage. If you want to try it out note there are several different types of actinic bulbs. I believe the pure actinic 03 have very low intensity so don't get that. Get the ones that are mixed like actinic+, actinic...
If you want similar design to the quantum badboys you can get the 6 bulb htg slimstar for $210 w/bulbs shipped but has 1yr warrantly. The sun blaze doesn't have individual reflectors but has 5yr warranty and they really quick on replacements. Not sure about the quantum warranty since they seem...
Keep us updated with the grow. From my experience.. I disagree with using actinic lighting because it cost 3x more for the bulbs and your results would no better then standard bulbs. I used my t5 from my mini reef tank before with actinics/aqua blue+. It did okay but 6500k bulbs did better...
From looking at that chart.. Instead of paying $20ea for the actinic bulbs which i think are only around 400-600nm wavelength .. wouldn't it be cheaper to get just to get the $7ea full spectrum t5 bulbs since it has the blue & red spectrum that plants mostly need?
You need better light dispersion. Your lights just coming down from the top and hitting the carpet. To make full potential of your lighting put it in corner and or surround with white or reflective material.
My hydro grow tent was in the 90's and everything was okay. BTW the plants will use up water more quickly and warm water in reservoir will cause roots to rot.