http://www.potsaa.com/covered-bowl/

my beta fish bowl is covered with a layer of ice looking over?
the top of my beta fish bowl over the last two weeks some began to ice up as a layer above. this is not exactly freezing in my room so idk what it could be. is not always there when he first arrived, I widened the gap layer, then the next day he was still there, so I changed the water and a week later, he returned …
Your fish may have a disease (I doubt) You must simply have a new tank Or get cleaner water.
Yummy Bowl – Licking a white chocolate covered bowl