Broken float support on Polaris 180 - best repair?

[aquarium]

The plastic extension that holds the stationary float has broken - see photo below. Inside the plastic is a stainless steel tube that appears to be an internal brace for the plastic. I'm thinking a lot of marine epoxy that encases the stainless tube and fills the break. (I can slide the plastic together to make the break just a crackline, it's opened a little in the picture for clarity.) Is there a better way to make this repair?

Thanks,

TW