Building 500 sq ft grow room

So I’m gonna be building a 500 sq ft grow room in July , after I harvest my 16x8 tent of autoflowers .

I’m using 20-25 fluence spydr 2i led lights , and doing several rdwc systems with autoflowers or possibly
Even a select cutting from a pheno hunt I currently have running “ 150 greasy runtz seedlings evenly spaced in three seperate 5x5 grow boxes .

So far I have 24 of the 2i lights , two 10 inch fans, two 8 inch fans , a quest 225 dehu, 3 smaller 6 inch fans with carbon filters , and three 4 inch fans as well.
I’m using a trolmaster hydro x controller , as well as a co2 generator I was given by a friend .

My goal is to maximize yield , environment quality , and have proper hvac . What do you guys recommend for a mini split ? I was thinking minimum 46k btu , also how do I go about setting the room up so that it doesn’t exhaust my co2 ? I’m gonna be running advanced nutrients ph perfect , unless someone can recommend a similar product that balances itself . I have an automated ph doser , but I’d rather keep it simple . Also looking for an ro filtration system that can filter at a much larger quantity than my current setup . I bought the ro filter from Home Depot , and I’m getting 1.5 gallons every 2-3 hours which is way to slow to feed my 128 square foot tent let alone a 500 square foot room .

If anybody has any information on the co2 generator I was given , feel free to chime in .

I just want everything to go perfect . Here’s some pictures of my “cooked” amnesia haze autoflower , first one I’ve grown since the original low Ryder dropped “gave a horrible first impression “

Amnesia is still pumping trichomes , and should be finished up in the next 2 weeks or so
 

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