Got tired of the finicky performance of the stock aerator on my 20 gal Creek Bank. Can't tell you how many times I woke up to dead ales because the aerator wasn't working well. (Gizzards didn't seem to mind as much). After reading the positive comments of the Dannco, I emailed Dan to see if he thought he could help me. $36 later (shipping included) I have bubbles that would make Lawrence Welk blush! Dan even shipped me the first that fits right into the same hole that the stock aerator was in. Great customer service. Not the first to say this, but another happy customer.