Eheim Substrat Pro 1L - Biological Filter Media Feeding Visual inspection and water quality

Visual inspection and water quality testing can help determine when it's time to replace the pads

A sensor changes reversibly from yellow to green to blue

Attach the airline to a TetraTec AS air stone

Aeration feature

choline chloride

Eheim Substrat Pro 1L - Biological Filter Media Feeding Visual inspection and water qualityEheim Substrat Pro is a biological media. This type of filtration is the purification of the aquarium water by using living organisms, such as denitrifying bacteria. These desirable bacteria will attach themselves to all hard surfaces within the aquarium system. They use the toxins as a food, converting harmful toxins such as ammonia and nitrite into less harmful nitrate. After prolonged use, mechanical and chemical filter media will act in a