You've got a pH problem from your hydroton. You need to prep it by soaking on pH adjusted water (5.8) for a few days before use. Check the soak water during that time and if it creeps up, drop it until it remains stable over a 24 hour period. An airstone in there will help mimic the conditions that the nute solution will be running.

Also, your nute lineup is pretty hefty. I'd start with just the bloom nute and silica blast (go easy on that stuff) until you get your pH stable. Check it every 12 hours at MOST and keep it in range by adding pH down until it is stabilized.

Finally, what is the ppm of your plain tap water? There is a possiblity that it is causing problems. Just check to put your mind at ease.