Re: Odd black mold like substance in sink drain
Howdy consider baking soda 1/2 cup poured into the drain and then 1 cup of vinegar. i cover the drain so the pressure created by the chemical reaction goes down the drain. and a n after flushing the pipe once this process is complete i then use a 1/4 cup ammonia pouring it into the drain again i cover it and let sit for 30 minutes then run water for couple minutes the ammonia kills mold and fungus. Also using an ammonia based cleaner in the bath fixtures is preventive and maintenance too.
NEVERix ammonia and clorox as posionous gas is result and death may occur...ic