Snail ID please

[candi]

I know this is not the best pic, but does anyone have any idea what kind of snail this is and if its safe to add to my tank? [attachment=0]ImageUploadedByTapatalk1363017912.428064.jpg[/attachment]

 

[candi]

[attachment=0]ImageUploadedByTapatalk1363021016.681682.jpg[/attachment]

 

[candi]

[attachment=0]ImageUploadedByTapatalk1363021051.036324.jpg[/attachment]

Thanks for your help! I hope these are a little better pics

 

[candi]

Thanks, I was afraid he wasn't going to be friendly. I appreciate your help!