How to make fish tank cover with PVC

Pvc can be cut with a tool knife if it is not too thick.

If it is only for the cover, it can be cut directly according to the size of the fish tank. The cup below is for reference. It's better to make it in two layers, so that the lid is firm, that is, the lower layer is smaller than the upper layer.

Be more demanding, just draw a few pictures on it.

Forget the first picture. . .

These are just references.