This guy missed a few decades of scientific discovery. Archaea haven’t been in a kingdom since the 1980s when Carl Woese reorganized the Linnaean classification scheme to include archaea as it’s own domain.
Yes grandpa got a point, you got to have something dead in your tank in order for your tank to work, such as those new fish you bought from grandpa’s store, come back and buy more, you need the dead fish.
