Good to see things are perking up, one piece of advice though; try to get the pH down to 5.3-5.5, allowing it to fluctuate up to 5.7-5.9 but keeping it within that range.
Now that the water is lowered and your plants can process more food, your water level will drop since they are pulling up water through the roots and dissipating it through their leaves (make sure water levels do not get too low, and the nutrient solution concentrates thus making the ppm spike). If they are pulling a lot of nutrients out of the water, and your ppm is getting lower, add some more A+B to keep your ppm count around your highest point as you want the plants to get used to higher nutrient feeding. If there is rapid feeding going on, the pH in your system will be actively changing so keep an eye on it. The more nutrients you add in, the more acid/bass buffers you are competing with so do not be discouraged if you need to add more than usual.
Additionally, if you can keep the temp down, that would be ideal. Personally, until I felt confident with my hydroponic skills and pushing plants with higher ppm counts, I didn't like pushing the Co2 levels so high, so if you want to cut back to 1000 ppm, that is completely up to your discretion.
If you are using an electronic ballast such as lumatek and are looking for an extra kick in growth too during the veg stage, I would recommend switching over to a metal halide bulb (might only be able to find 400 or 1000 W in true halide) or 600 W metal halide (HPS conversion bulbs). The blue tinged lighting is ideal for long veg hours vs. the HPS lights that you are currently using (judging from the color in the shots) which are ideal in bloom. This does enhance growth initially, but its also a long term investment because it will enhance your future cycles. If you choose to do this, you would switch the lights (metal halide to hps) at the beginning of your 'transition' cycle (2 weeks) that is in between veg and bloom.
How long do you plan to keep these plants in veg?
What light cycle are you currently doing? (on hours / off hours)
As we had discussed, getting these plants bushy and spread out is ideal, so with 3 - 4 weeks of aggressive veg and guiding you, I believe there still is the potential to produce a copious amount of high quality medicine. For now, the primary goal is bulking up your root system by allowing them to recover from being drowned and letting the plant really get situated. Once you enter the bloom phase, the roots will stop growing so its very important to lay proper root foundations in the veg phase so the plant is hardy and able to absorb vast nutrients in the bloom phase. Additionally, if you hurt the plant in the bloom phase the roots will not recover effectively and affect your yields drastically, so by having a bulky root system going into bloom, if there were to be damage, the plant is hardy enough to keep going and your yield is salvageable. With big root systems though, its important to watch out for root gnats and other pests so having products like sm-90 in your system is never a bad thing.
I haven't seen any fans, but hopefully you should have almost all of the leaves on every plant, every few seconds dancing gently in the breeze. This makes all plants happy :)