There are several things to consider. How large is your fish tank?

Amount of light will be a concern.

Also, being in a glass container could be a problem as the bamboo grows.

There are several small species that grow only up to three feet in height which would work for you.

Pleioblastus, Pseudosasa, Sasa, Sasaella, and Shibatea are some of the species to look at. Pleioblastus has several species that would work.

Kt

If you're going for the "leaves on top of stalks" look like large outdoor bamboo has, then go with the lucky bamboo (dracaena). None of the smaller bamboo species will give you that same look, as they're mainly lots of leaves with thin culms (stems).

Keep in mind that it will be hard to keep the dracaena small, although cramming dozens of plants together might help with that.

I planted a fishtank as a terrarium, and some of the plants in there quickly dominated all of the others. Now I've got it planted with cactus and other slow-growing succulents (photos in link below).

Here is a link that might be useful: my cactus terrarium

mr gourami Try the species Psuedosasa Japonica it will do well for you in the terrarium. But you will want to keep it on the dry side in other words let it dry out some before watering again. They like to be drier than most bamboo and do well in a pot inside my greenhouse. Good Luck.