Rather than go ebb/flow, have you though about adding more perlite, hydroton, or grostones to the coco, and doing a drip system? It doesn't look like you've got a whole lot of aeration in there, but I could be wrong. I have yet to have any problems with coco and salt build up, but I don't ever let the coco dry out (I'm using open ended drip tubing on for 2-5 mins 1-5 times per day depending if they can suck it all up). It's the drying out that seems to be the culprit for most, at least from what I've seen around the net, also not doing enough waste at every watering. 20% is a general rule, but I've been getting by with much less at times. A good flush every few weeks with plain water never hurt anything either. I've been growing much less time than you though, so take that with a grain of salt.
On a side note, how have you liked the Cali Connection genetics? I've heard great things but you seem to have quite a bit of experience with various companies so I'd like your input. I'm mostly interested in consistency within packs, and overall potency/quality/yield.
Looking good bud! Keep blazin'!