unless I'm mistaken the carta uses a specific type of glass connection whereas the hydratube is just a regular 14/18mm joint connection, I don't think it would fit native and would likely require some kind of adapter if its possible
yeah all the erigs in my experience use the same type of glass with that little side connection/slit down at the bottom to connect to the atomizer chamber. tbh i dont really think there would even be a way to do an adapter to make a vapexhale hydratube fit it. hydratubes have basically become extinct in the past few years which is a shame so it seems no manufacturers care to support them.