I started my system on 1/6/21 and have had trouble-free operation since. The only thing extra needed was a small water heater. It sits on my kitchen counter on a west-facing window, which is plenty of light for microgreens, even for the Pacific NW. I have checked my tank water semi-regularly (for free at the local big-box pet store) and the water quality is always good - hence I have never changed the water, even though the recommendation is to change it every 6-8 weeks. My betta seems happy and healthy. I add tap water conditioned with Top Fin "Betta Water Conditioner" as needed, and that's it. Some green algae started growing on the tank sides, so I wiped in out with a plain magic eraser. It stirred up about of silt and algae making the water cloudy, so I was kind of disappointed. But within 2 days of circulation, the tank water was clear and the microgreen roots had captured the suspended material. I told myself it the betta lived more than 6 months, I would write a review, so here it is! You will love this product.