i'm indoors with soil. i have a permanent flower room with plants in different stages of growth. i hand water using Botanicare Pro Blend, super thrive, and jamaican bat guano applied as a surface feed to the soil. i've grown outdoors and when it comes time to flush i just flood my pots 3-4 times over the last two weeks. i run the hose thru them for a couple of minutes. then i let the soil dry and repeat. this has worked great for me in the past. being my first indoor grow can i do the same. maybe take the pots out of the room for a few minutes to flush them? i just what to make sure all my guanos are out of my soil. when applying as a surface dressing is it hard to flush?