I'm relatively new to backpacking so forgive me if this is a dumb question, but I'm wondering if anyone uses a water filter AND water purification drops or tablets.

The trips I've been on so far I've used a Sawyer Mini and that's worked fine. However I know there are things it cannot remove from the water. I've been considering using Aqua Mira tabs along with the filter. Does anyone else do this, or is this just unnecessary overkill?