With my FW tanks I have always had cover glass or a hood on the tanks - stops fish from jumping out to chase the cat and reduces evaporation. In looking up information on what sort of fish would be good for my new tank I read that some are jumpers and need a cover on the tank. I also read in another article that glass inhibits/blocks the UV light waves and that's why you shouldn't have it on reptile tanks or marine tanks. As I am a newbie, can someone explain this to help me understand? Thanks.


