Use Supernatural Super Leach. Follow the directions and then run at least 5 times the volume of tap water threw the plants. Check the runoff. Add lime to neutralize the soil, it should have been added at the begining befor the plants. Only use a little bit as too much will fry the roots. Don't run a res when you have plants in dirt. Mix fresh nutrients, if you are always feeding them with food you will have issues as the soil holds nutrients, should only be feed fertilizer once a week sometimes every 2, don't over water and feed from the bottom, feeding from the top creates lazy plants and is not really natural, plants feed off of ground water tables in the wild.