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.
Dido, also called Elissa, was Princess of Tyre in Phoenicia. Escaping tyranny in her country, she came to Libya where she founded Carthage, a great city which Aeneas and his comrades, who had become refugees after the sack of Troy, visited seven years after the end of the Trojan War.