Runoffs are significantly below inputs-Do I have a problem?

plant is healthy. learn a baseline before reacting to something you feel might be wrong. those magical products that you use at particular times are mostly useless too. It's over-sophistication to make people feel like they are doing something useful. I guaranteed if they had the balls to compare results in a scientific study, AN and the rest would look like retodds and more than willing to exxoit their customers for financial gain. Besides a healthy plant there really isn't much you can do that genetics does not control 95-99% of outcome.

A drop in pH can be a sign of root rot BUT root rot would cause discoloration and an overall sick-looking plant. I wouldn't put too much emphasis on the run-off value as long as the plant looks healthy and your plant looks absoluty heathy and ideal.

This is what is meant to happen. Feed goes in, less comes out. PH from run-off from feeds etc. You really should look to see what you're seeing. Its weekly flushes of just water. You will use the pots value of water for a hard flush to flush of salts and that. I'm not an expert on coco, I've only used it once. But, you shouldn't be seeing large run off in every feed. Its a weekly process, or a fix if overfed etc Also you're using way to many nutes. Big bud: good. But you don't need sugars, bud enhancers until there is actual bud. Big bud is a stim used for the 1st 2 weeks in pre fower. Then you start adding the sugars etc.. There are many guides. She is looking super tight though. Don't stress it too