4x4' 4-way LST SCRoG first attempt

Moved all but The Church (restart) into the tent, lights 18" above plants. They seem like they're off to a rough start, this is my first time using this jacks professional 20-20-20 fertilizer, used at 1/4 tsp per gallon. I'm not sure if I overfed them or if the medium was too wet causing stress or a lockout? 4x4' tent was setup, running 2x mars hydro sp-250 LED lights and 8" ducting for ventilation and exhaust. This is my 2nd grow using them, I was so impressed with their performance in a pair compared to my 600W MH/HPS setup, I am now switched over 100%. Heat is still there because the drivers run warm, but my tent generally stays under 10F above ambient, and usually in the perfect temp zone. I do feel like at 525 watts at the wall it gives better performance overall especially for a flat canopy compared to a single 600W MH/HPS under a basic reflector. The 3 older girls were topped between the 4th and 5th node.