Really appreciate your succinct description of your set-up! "Usually" the wilting leaves is either too much or too little H2O! Do you have a source of CO2 there?
My own (1st) Indoor (have done outdoor long ago) has "weathered" my own inexpertise, and we are now at week;13 or 14 since planting my "Seed's" from SOHUM; Kona and Hula Buddha (Southern Humboldt Cooperative) and i'm pleased, but getting (somewhat) impatient (hold on Mike!) finally getting some nice flowering! Figure i might be three weeks till harvest (fingers crossed!) O.K. in a 4X4X76" Grow Tent (GrowAce and i do recommend them) using 400W MH/SPS (two bulbs and next time i will use them both at same time!) we've been on Sodium bulb for about 9 days now. H2O is Filtered using simple ZERO system! Nutes are "OneNess" (solely) by Humboldt Nutrients. 4" intake fan and charcoal filter. "The Exhale" (35.00) provides the CO2. and time cycle now is 12/12. I made very early mistake by smaller containers, and NOT enough time under lights!(during Veg stage). IF i could figure out how to load pic's on this site, i'd post some i made! BEST of Luck Bro!