Can We Colonize the Sea With as Many Bacteria as We Can Produce?

We use a plastic that has specific labeled carbon isotopes so-called carbon 13. The fact that we found it there means that they have actually eaten it and used it as a resource to grow. So the question then becomes is whether this could be a real solution to the problem of plastic pollution. Could we just colonize the sea with as many of these bacteria as we can possibly produce? Well unfortunately not I mean I get this question applied often and it would be very nice but personally I would also see a large logistics problem.