2xDG & 3BOG

well it looks to me as acombination of a hot growmediuum/ ppor watering and a to close lightdistance its just the beginning and plants recover for sure the P2000 are superstrong lights, even in comparison to the other quantumboards, dimm them back to 75 percent, and you see the plantt grows much better and bigger internodial distance. water daily because they sweat alot, water evaporates, and nutrients remain in the plant and burn so more water or more often but no to much😅 I wont take calmag, because it contains nitrogen, and they have enouggh nitrogne. but there are products without nitrogen oryou take calcium and magnesium from supermaarket and dissolve it anss water with itt, or topdress with calcium and magnesium tablets as i said its only a minimal damage . but the new growth should be fine

You wont hurt them will a little bit of calmag, like 2-3ml/g so I would try it, however its very hard to see a deficiency in the pics. I'd triple check my ph and make sure that's not whats causing your issues. Im also not a soil grower but most say 30 days for ffof and happy frog.