Do not keep the soil wet. Cannabis prefers a wet-dry cycle. Allow ample dry time after a flush. The medium will be pretty darned saturated for a while. Skip a watering or feeding if you must, but don't keep the soil saturated for too long.

The plant stays put. A flush is between 1 and 3 times the volume of the pot, with clean, properly ph'd water. A one gallon pot, with a small (monthly) flush, would take one gallon of ph'd water. A "holy crap I REALLY overdid the nutrients" flush would be the 3 gallon flush. In a 3 gallon pot, a monthly flush would take about 3 gallons of water...and so on...

Getting the right tools for the job saves heartache, time and money in the long run. The soil could very well become a BIG problem soon. The buffers only last about 6 to 8 weeks, and the ph is low already. Once the buffers fade, the ph dives, which locks-out the nutrients.