Heya lxnay,
I see you are using coco so I would flush with a low ppm water w/calmag at correct pH. I would water twice the amount as usual then test the run off water and see if it is the same as what you are putting in. If it isn't, keep watering until it is and then continue watering as normal.
I would also recommend some perlite next grow, it allows more more aeration and drainage. I find it really helps with root growth on the plants. Most people I know do a 60/40 mix of coco/perlite. I personally love the opposite with 60/40 perlite/coco.
Good luck with the grow!
Cheers,