Ask everyone, why don't everyone's fish tanks have lids?

There are many fish tanks with lids. According to geomantic omen, the fish tank should not be covered, and the covered tank should be opened, but it is only under the premise that the fish tank is placed in line with all the requirements of geomantic omen that the feng shui effect can be produced by fierce opening.

(1) Large and medium-sized arowana are covered, and many of them are designed to be half-opened, with at least one feeding port. The main thing is to prevent arowana from jumping out of the tank, otherwise it will lose a lot;

(2) Generally, there is no cover for the water plant tank for landscaping, and the water plant lamp is placed on it. If you want to save electricity for heating in winter, you can cover your body with a piece of glass, which can effectively reduce the loss of heat.