Can you provide some pictures of the fish in the water?
I have never seen albino or white tilapia but there are white convict cichlids. However, white convict cichlids don't normally have red fins. They could be a species of Tilapia but not the common Mozambique. They don't quite look like convicts either.
Grow them up a bit and see what they look like in a few months time. If they are still small then it's less of an issue. If they get bigger they will be a major issue in the water ways.