pretty quick..... it causes a ppm imbalance across the gradient.
in layamn's terms, that means it will wick the moisture right out of your plant, and fry it, just like if you overfertilized.
the best solution, is to flush NOW, forget about 3 times the pot, let the hose run on that bitch for a good 10 mins. then transplant, ASAp into some decent soil in a more clandestine location.
i know it seems like your mom is just being a total b____, but you gotta understand, ur parents could lose there house, potentially, if you got caught growing without a mmj card.... be a little more discrete in the future man....