My betta's been acting weird and I'm not sure what to do. He is a bit over a year old is in a 5 gallon tank with 2 platy fish and seem to get along fine, but the betta's been acting really strange lately. He lays on things like a rock or on the ground and doesn't move that much for a while. Almost seems like he's dead really. He sometimes lays on the suction cup of the heater with his body kinda out of the water. He doesn't appear to have any weird molding on him or any gold or silverish dusting either. He also is eating fine.
Tempature is about 78-79 and I know the ammonia is a little high but I've been working on that and should be lower now.
Here is a link of some pictures of him http://gallery.me.com/mpertz/100110
Please let me know of any ideas of what it could be.
Thank you so much in advance!