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Maracyn® will not harm invertebrates
They can help you build an auto-top-off
ReDox (ORP)
Smart Stir has a built-in rechargeable lithium battery which reduces waste batteries
The bacteria growing in the top 1/4" of the surface of the brick will be aerobic and will use up all the oxygen so that the inside of the brick goes anoxic or anaerobic
ESV AQUARIUM PRODUCTS GRANULAR ACTIVATED CARBON Size:14 OZ Maracyn® will not harm invertebratesGranular Activated Carbon Our Granular Activated Carbon based on bituminous coal provides the best combination of pore size, particle size, high surface area, low ash, and hardness for chemically filtering aquarium water. In addition, test results indicate no leaching of phosphate. The high hardness level of this carbon prevents the dispersion of particles throughout the aquarium, which is more likely to occur with softer grades of carbon. Our
