Galaxy ballast vs aqua medic

[spit.fire]

I've got both ballasts dual 250w hqi but both of them have one side burnt out. The aqua medic isn't under warranty and I don't have a receipt for the galaxy

I was thinking of just combining the two to make one and I'm wondering If this is a good idea or if I should just run two boxes.

I plan to use them to run a coralife aqua light pro