So guess what! Linguini was doing all fine and dandy after he was almost dead during the christmas holidays (refer to the thread titled "HELP!! *urgent*) , but today I noticed he was acting very strange.
He's been sitting at the top of the tank a lot, sometimes completely on his side, but when I come up or near by he'll swim around and act normal again. Though right after he'd go back to the top and lie on his side looking rather dead almost.
When I turn the light off that's to warm the water, he'll go to the bottom in the matter of 10 seconds. And vice versa.
Is this normal at all? Should I be concerned?