Are you in a room or a tent? I grow in the basement too, and my solution was to get a big ol' sheet of plastic and lay it on the bottom & up the sides about 5" (inside). I did have a run-away but the math on a space that's 15 square feet at 5" vs. the 20 gallon reservoir means the water was about 3" in the tent, tops. I keep all my electrics raised, so there was no chance of a fire. scooped out the water and spent an hour or so with a towel getting the rest out and I reset the carrots. It was my fault, not theirs.