Drop the organics. Liquid Karma is maybe good for running DTW tables but I see little reason for using Liquid Karma in recirculating Hydroponics.
I get better results with foliar feed and I don't really want to destroy what's good about Hydroponics. What you do is removing as many variables as possible to get rock stable PH. Keep the rez and rootzone clean and focus on surface tension. Biofilm should not exist in a Hydroponic system. When you have got a basic understanding of how Hydroponics work you should see no reason to use Organics. It will only give you more cleaning work, pH fluctuations and bad bacteria cultures.
I use bleach (3% Sodium hypochlorite) to run 0,5ppm residual. Why everybody insist on running enzymes and other additives growing Cannabis in Hydroponics I think is just a result of marketing. Sterility and a Complete plant food is all that is needed.
24/7 spray/pump time is ok for LPA. I don't think there's anything wrong there. I would run it with tighter intervals than you currently do.