[robyn]

1)my air pump has a small switch on the side. i cant figure out wat it does, except that the filter is slightly quieter. is that all its for or is it something else?

2)im writing exams at the moment and i was wondering if i could turn the air pump off while i study or if it will hurt my fish? (alternatively, if that switch does make it quieter then its not neccessary)

3) my betta has been much happier since i bought him a new tank, but since tues iv noticed he likes to lie on the gravel by the filter. is this normal or is he sick? i havnt seen any visible signs of illness