There are differences between plexiglass and ordinary glass in terms of weather resistance, acid and alkali resistance, light transmittance, impact resistance, longevity, weight, etc., and plexiglass performs better in most of these aspects, so it is more suitable to be used for making fish tanks.

Specifically, plexiglass has the following advantages:

1. Light transmittance: plexiglass has very good light transmittance, the light transmittance rate can reach more than 92%, while the light transmittance of the ordinary glass is relatively poor, and it is easy to produce a fuzzy and dim feeling.

2. Impact resistance: the impact resistance of Plexiglas is sixteen times that of ordinary glass, so it has better impact resistance and is not easy to break.

3. Lifespan: Plexiglass has a longer lifespan than ordinary glass, which ensures the longevity of the fish tank.

4. Weight: Plexiglass is half the weight of ordinary glass, so the buildings and stands bear less load.

5. Price: Plexiglass is more expensive than ordinary glass.

In summary, plexiglass is more suitable for making fish tanks, but the price is relatively high.