There are a lot of differing opinions on that. Some people think you should change out more, but I think changing just 20 percent is less stressful on the aquarium and fish. Once you get used to the regimen, it's pretty easy.
Brian K. VaughanI grew up in the suburbs of Cleveland in 1988 and there was just one year where suddenly all of the delivery kids that used to be boys were suddenly girls. It happened at our church too. Altar boys were suddenly altar girls. There was just this sense that all these young women knew there were openings here to be the first of their kind.
Brian K. Vaughan