i came home yesterday and as i always do, look in my tank to make sure everyone is ok, i found everyone but 1 yo yo, i looked under both filters and he was under one laying on his back/side and curled like he was dead, i took the hood, light and glass lids off to get him out and do a
water change (i was told you have to do a water change after a fish dies), so i stuck the net in the tank to get him out and all of a sudden he freaks out and swims away.....what the heck was he doing? sleeping or was he almost dead?
i dont know if he's just a tired fish or whether he's sick, when there's food he'll go crazy and eat but when it's all gone he'll swim around for a bit then go chill out in a hidey hole somewhere and won't come back out. his colours are fine.
can someone please help me as to what's wrong with him, if there is a problem??