hello all! We have had a betta fish for about 5 months and about 3 months ago, our betta started tilting to the side! There were several occasions where I though he was dead and when I went to get him out, he started swimming around like nothings wrong! I put him in a different tank today and watched him swim for a while and it seems like he is floating back up to the top like his equalibrium is off! What is wrong with my fish? He hasn't died and doesn't act sick otherwise, he even swims around on his side!!