You should try adding some molasses along with your feeds. You may need to keep a wee eye on the tanks and pumps but with 1 tbsp per gallon if water then it shouldnt pose any problems. If you can do a side by side grow with same seeds as each other, feed both as normal and use mollases (black treacle) with one tank. That will give you a good indication of how much extra growth you would get compared with just feed only. If you find it gives an exta few grams then you can do that with your subsequent grows, it also helps with resin production. By the way am getting some good return of bubble from your trim. 2.5g from the autos and mix in total, and working my way through the vk. That stuff is giving a nice yield. Will post a pic once it all dried and away for its final cure. The best is still yet to cum though. 2 final bags of trim with a shed load of dust and then all the popcorn buds. Gonna do that seperate from all the rest. Should notice a difference in quality.