Let me know what you think about the aquaponics sand setup after reading the research. Edit: here's a link to a comparison of gravel and sand as the biofilter m

Let me know what you think about the aquaponics sand setup after reading the research. Edit: here's a link to a comparison of gravel and sand as the biofilter media: http://iavs.info/commercial/sand-vs-gravel-etc-as-a-biofilter-media/ http://iavs.info/commercial/sand-vs-gravel-etc-as-a-biofilte... I've only been running the system a couple months, and haven't seen any problems. Of course any system will need maintenance, but in this case, it's on the order of once every couple years. Here's the relevant link: http://iavs.info/commercial/sand-is-amazing-but-its-not-magick/ http://iavs.info/commercial/sand-is-amazing-but-its-not-magi... I don't have a DO sensor, but I do measure ammonia, nitrates, and nitrites. There were the predictable spikes in ammonia, then nitrites, then a smaller spike in nitrates that you get in a typical aquaponics startup cycle. My pH started out high (~8), and is slowly dropping. It's around 7 now. Like I said, I know my tank placement with respect to the sun is not optimal. I think the reason I haven't seen algae growth in the tank is because the water is not clear because of the sand fines. The water should clear up once the biofilm/algae gets more established in the furrows; maybe I'll see some algae growth in the tank at that point.