I've had problems with my nitrates slowly increasing over the last 2 years, and tried many things but none were long term successful. I read about the sulphur reactor concept and was intrigued but purchase costs high. So I designed my own low cost solution with basic PVC parts for ~$40.. Water is taken off the main tank return flow and passed thru the reactor. The reactor has 2 chambers, one filled with sulphur Caribsea LSM (Live Sulphur Media) and one with crushed coral Caribsea ARM (Aragonite Reactor Media). The LSM is already infused with bacteria for the sulphur reaction. The media is placed inside a fine mesh media bag to contain it. To start operation, fill the reactor with salt water and then stop all outflow for ~4-5 days. The bacteria process will consume all oxygen and the water becomes (anaerobic). Next, start the drip flow at very slow drip rate. By allowing a small amount of water to enter the reactor, the reactor water becomes anoxic (Low Oxygen). The sulphur reaction will then use the nitrogen, breaking down both the Nitrite and Nitrate molecules. Initially run the drip flow to run into waste receptacle for a few days and then test the nitrites/nitrates. Depending on the drip rate, sending the drip to a waste receptacle may reduce both water volume and salt content in your tank. Monitor top-off and add salt if necessary. After a few days, with a low drip rate, the nitrites and nitrates will drop to zero. Now you can reconfigure and allow the drip to enter ...

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