I do, and here's how I do it. I take the old potting soil, put it in a 3 gallon pot, and pour a kettle of boiling water through to kill it, then I mix it half and half with new potting soil. Things grow very well in this, and I've never had any root rot problems from the old soil.
Didymo (Didymosphenia geminata), also known as rock snot, is a non-native invasive microscopic algae (diatom) that can produce large amounts of stalk material to form thick brown mats on stream bottoms.
Profile: 1  Alexander Nestor Haddaway (born January 9, 1965 in Trinidad) is an early nineties eurodance singer who hailed from the unusual location of Trinidad & Tobago. Haddaway's 1993 self titled debut CD spawned several hit singles, most notably the No.1 smash 'What is Love?'. His second album 'The Drive', released in 1995, was more of the same.