As I told you earlier I had a goldfish that lived with me for over 20 years, a real grand-grand-grandfather. One of my favorite tasks was cleaning his fish tank with the gravel. I cleaned it every week by hand and let my goldfish in the meantime swim around in our bathtub – which by the way he loved incredibly.
My fish tank and gravel cleaning tasks though could best be described as trial and error actions. At that time I didn’t know about those great fish tank gravel cleaners that come with hose and pumps and simplify the whole fish tank gravel cleaning task.