Im gonna start my own grow room and decided to go hydro. I will be using 2, 18 gal. rubbermaid (Bubbleponics) and four net pots in each and 400 watt HPS/MH conversion bulb. Im using seeds i have collect from sacks that range from mids to high grade. I know which are which. Im wondering when i sex all 8 plants, im expecting half of them to be male and they will be cut down, so what should i do with the emty net pots? Should i leave them emty so the other plants can have room? I need options!