Well I got BOB as gift he has always been in a vase like tank but without the plant, he was in that for about 2 years then i got him one just like it but bigger and he was in that for about 6 or so months, well about a month ago i go him a nice glass bowl to put him in and all of a sudden this week he seemed to stop eating and stayign at the bottom alot....Today I noticed he only moves if i touch him and he is staying at the bottom almost on his back i researched alittle, and i think he may have ammonia poisoning, he has the red tint on his gills and tips of his front fins, that was one of the signs, i chekced the ph and water chemicals and everthing.......i also changed his water, the new water has ph of about 6.8-7.2, chlorine is 0, hardness is 0, i dont know what else to do.........could he just be old? How lonmg do they normally live? he is almost 4!!!!!