Is there anything I should do inside the house to help the system?

Absolutely.  Be sure that plumbing fixtures such as toilet bowl fill valves and faucets are maintained and do not leak.  You would be amazed at how much water passes through the system with a small leak or dripping faucet.  Your system is sized to meet standard flows from your house and therefore any excess flows will not help water treatment. Remember that maintenance of these fixtures also conserves your water.