If the pool isn't so crowded and you can have a lane to yourself, you might try deep water running too. It's neuromuscularly the same as running on land - in fact it always helps my "real" running form when I do it, because it reinforces the feeling that my lower body is dangling from T12-L1. The only trouble is you're moving so slowly you really can't share a lane with even the slowest swimmers. I need some pool time myself ...