Ouch! The closest thing I could find to 1.75was a gravel tube for fish tanks an it was 1.67 I have a really tough time getting in it.It is very uncomfortable, I was thinking of just trying a 2 inch one but was wondering what are some alternatives to the ones on that website? Really don’t have that kind of money to be throwing on a pump for my little friend lol! So if anyone could be kind enough to help me find a good alternative for a tube that would be great! Thanks in advance an to this forum it’s been great.