I have been somewhat keeping up with water changes, probably once a month. I've been testing my Alk about once a week or so and its been rock solid. I dont have to add kalkwasser too often to the reactor as I dont dose too much, just enough to help blow off excess CO2. The calc reactor is way oversized for the tank so it only needs media added once a year or so. Thanks for the idea of the kent scraper, I got one of those around I'll give it a whirl along with my Magnavore 8 with the scraper. Im going to continue the elbow grease approach before doing anything drastic.