The trouble with contamination is that usually by the time it appears, it’s too late. The colorful shades that appear from common mold and bacterial contamination have spread tend to appear after they’ve spread mold spores around, so your best bet is to bury the offending mushroom block outside, disinfect your space thoroughly (peroxide is your friend here) and run an air purifier if possible. It’s tempting to try and rescue a contaminated grow, but it’s rarely worthwhile and you run the risk of seriously contaminating your space for future grows when you keep going with a contaminated brick. By burying it outdoors, you give nature a chance to take over and restore it, and if you keep an eye out, you may just see some perfectly good mushrooms pop up where you buried it.
