Angel in odd position

[tiguardo]

My little black Angel seems to be floating in a bit of an odd position today. Nose up, quite close to the bottom of the tank. He doesn't seem in discomfort, his fins don't look clamped & he can turn himself around. Once he stops swimming he seems to settle in this position.

Any ideas??

 

[tiguardo]

The odd behaviour continues....

The angel is now swimming around normally, if a little nose up, but has moved away from where he was.

Then I looked around to find one of my Bristlenose Plecs laying flat on his back outside his favourite log in a very strange position. When I opened the tank lid he flipped back over, puffed out his cheeks & carried on as normal. Very strange??

I've just done a water test and i have Ammonia 0, Nitrite 0, Nitrate 5 & ph 6.5(normal)

A day of weird behaviour.....

 

[tiguardo]

Sadly on my return home tonight she was really struggling, so I thought it best to put her out of her suffering. Poor thing