New growroom setup 250w hps Cooltube grow tent, ph+temp+humidity+new soil recipe

Hi guys I've improved my grow setup, bought a 80x80x160 grow tent and put my existing 250w hps + Cooltube in, going through a 5" cooltube and carbon filter.

New additions to my setup!

Temperature and humidity guage (currently sitting around 76-79 with 48-53% humidity).

Now ph balancing my water (after 18 months of using straight tap water which turned out to be 7) balanced to 5.8.

New soil mix, not much of a recipe but I'm now using miracle-gro all purpose soil with bat guano and fish, blood and bone meal in and I use Biobiz organic flowering nutes during flowering. Thinking of getting some worm castings but as you can tell I spent a lot of money on the whole new gear.

Can anyone help with extra parameters I can control or other ideas that would benefit me? I have a co2 fire extinguisher which I just need a regulator for and I'l get that hooked up (anyone know how I can get the most out of the co2 pumped in before its extracted by the fan?)

Currently growing in small yields of Mataro Blue, Dinafem Roadrunner, PurePowerPlant and Chernobyl.

Pics on request

a CO2 fire extinguisher? never heard of 1 being used for growing. my guess is it will be very costly to fill. you might want to research that before getting a regulator for it.

I don't see much reason why not (but I always research thoroughly before buying anything) and fire extinguishers are very cheap to pick up refurbished. 15-20 for a 2kg, but I'm not entirely sure how long 2kg would last. I would expect a fair while bearing in mind the small size of the tent.