Depends on the TDS
of your local tap water. If on the higher side, it would help in keeping the unit 100%. Most Ebay units are opeque so you will have to look for ones from an online fish store. They can be rather pricy though. Wouldn't hurt to go to HD
and see if they sell the clear canisters and compare costs. If inexspensive, you could buy the clear canisters and replace the ones the Aquasafe comes with. You can also e-mail the seller and see if that's an option when you buy.