watering Q

im sprouting various seeds (edible) such as lentils/soy beans etc. and was told that using the run off water to water various plants is very beneficial as it brings them plenty of nutrients.

would it be a good idea to use this for watering my marijuana plants?

I have used the run-off from cannabis to water houseplants, with no ill effects. I would water the plants you value the most with fresh nutrient solution, and use run-off for plants you value less. Whichever that may be.