A Tank with part of the glass cut away. Why?
A little while ago, I found a tank by the side of the road, and brought it home on my bicycle. It's a 15 gallon long tank, and I'd like to keep my pair of female rice-fish in it, and perhaps introduce them to a male at some time.
But a strange thing: the glass at one end of the tank is cut away about four inches from the top of the end. A removable piece of plastic was fitted into the space, and seemed to be molded for that purpose. But why would one want to cut the glass like that? I'm puzzled, and am considering getting some aquarium caulk and sticking in a new piece of glass. But first, I'd like to know why the cut was made in the first place.