Also what's the ph of the soil?First off, are you feeding them anything? What is that medium I see there?
Don't do that.Yes it's good to know the ph, but don't test the run off from the pot.What ever your soil ph is, that is what it will stay.Ph is your problem. The plant can't absorb the nutrients, your ph should be about 6.0-6.7. Just go buy ph test drops from hydro or pet store and test the run off water from soil when feeding.