Check some local hydro shops for a used one I got a quest 105 years ago when it was the most effecient one for $800. They said it was only used for 1 grow alot of people fail at growing haha. I hung that big ass dehumidifier above plants in a 4x8 tent it's made for over 3000sf but used less...
That doesn't mean the lights to intense thats a deficiency. More light needs more nutes. If you lower the light levels they need less nutes so you would see better growth with less light if you aren't feeding enough. Like if you have an even 800 ppfd spread vs 1000ppfd the nutrient needs are...
Maybe megacrop needs some extra epsom. The part A and B combined is the same grams total for both just slightly different ratios if you ran either one with either recipe it would probably work. MC might have more part A because they don't recommend the epsom
Well it's a 2 part vs 3 part MC part A probably has more magnesium sulfate in it already with Jack you can just follow the label I would hope it's the same case with MC
Don't plan on more than 4lb your first grow 10 won't ever happen from your setup. If you had 5x5 tents it might be possible but tents are horrible to grow in you will run into alot of problems