Im thinking an issue with feeding.
You could try posting what you feed, in what ratios & your environment lighting,temps & rh so that others more experienced can help.
Is the moorbloom all you've ever fed? All of those leaves fell off but you still got some leaves at the tops, I can't help but think over/underfed.My bad i forgot the info. 32x32x64 tent, ts1000&sf1000 black gold soil,bottled water and every 4 waterings a hint of alaska moorbloom. Temps between low to high 70's. Are my lights to low?
Will beesafe 3n 1 work? Or gi buy a bag of lady bugs?