I normally water using earth juice to see blast the dry stuff and I rarely get any run off they are in 7 gallon fabric pots the plants are starting to get light in color so I checked my run off and it’s sitting at about 1300 talked with my grow shop and they said I should be using Cal mag plus with my nutrients every watering which I have not so now I am flushing some of this salt build up and using Cal mag plus while I’m flushing dumping about 8 gallons or so of water in each pot dose this sound ok at this point