Four Skywalker OG’s

Changing out Co2 tank today, just ran out. I modified my Single hose portable AC to dual hose. Unfortunately it helped keep Co2 in my tent but I can't get over 1100ppm. I'll be getting a new portable AC unit with dual hoses after this grow. Threw in some old pictures starting out this grow. Video of the feeding and draining setup. There’s a 15 gallon reservoir but I only do 5 gallons in it unless adding cal/mag water to raise PPM & EC. Trying advance nutrients except for bud factor X. Terpinator does the same job for much less!