I've noticed recently that one of my danios is acting a bit wierd and isn't eating properly. He is very skinny, even though i did see him eat a little this morning. Anyway, I went out and got back just under an hour ago and he was lying at the bottom of the tank.*

I thought he was dead but then he moved but couldn't seem to swim off.*

But after that i went to have lunch but when i went back to check he was swimming happily with the others.*

Then as I sat to watch he sank back down again.*

Any ideas whats wrong?
Im planing on testing the water this afternoon, and ill let u know the results when i get them.
Thanks
Gwenz*
P.S. - here is a pic of him lying at the bottom. Sorry about it being green - another thing i need to do this afternoon, clean up the algae!!*

That is the only part of the tank where there is algae as well! He must be trying to hide in it or something!!