OK, flush sounds like the consensus. Thanks guys.
If i mix together a nutrient solution and pour it into a plant, the runoff that happens as i am feeding the 1500 solution, should be the same as what was poured into the plant? I am not sure but i think so. I know that 1500 is high and the reason i went with it was because i had only foliar fed for the few weeks before and they looked deficient, So i used EXACTly half strength of the back of the bottle recommendations for the Bloom, Karma, Calmag, and sweet. It is frustrating that half strength could be TOO MUCH.