Nope Sorry, 1.75 is too small for any tank mates. Now... if you got a bigger tank... like 5 gallons... you could do more

Most smaller fish need 6 other members of their own species, snails produce too much waste, and shrimp would work in that size tank if it didn't have a predator in it they need more space to hide with a betta around

 

What about like, a snail, would that work?

 

Snails are REALLY messy, they produce a lot of waste, unless your tank is seriously planted with a lot of live fast growing plants and you're willing to do multiple water changes a week, I wouldn't add a snail in a tank that small.

 

Okay. So if I did indeed get a 5 gal. tank, what kind of fish could I keep with my betta?

 

Shrimp and snails mostly. Some people manage a small school of neons or endlers, but fish need more space than a person might think. I was really surprised when I first got into fish keeping about what fish really need.

If you want to have a legit community, go with a 10 gallon or larger, then you could have a good sized shoal or school of fish or bottom feeders like cory cats.

 

And know your water's ph and hardness so you don't go through the heartbreak of losing fish because the conditions weren't right.

 

+1 to that ^ thank you, I always forget about water param stuff ^^;