This one I have actually run
Before Sōsuke Media, I owned and ran a local aquarium service business — maintenance routes, water chemistry, glass and acrylic, sick tanks, clients who wanted the display perfect for a Monday morning lobby. So the advice on this page is not researched from the outside.
The thing most aquarium service sites get wrong is selling tanks when the business is really selling reliability. Nobody buys a maintenance route because the photos are pretty. They buy it because they never want to think about the tank again.