Review on 🧼 EHEIM Substrat Pro Bio Filter Media (Sintered Glass Pearls) 5L by Janelle Morrissey

I've been keeping fish for almost 40 years and have been a die-hard eheim fan for almost as long. Günter Eheim was a visionary engineer and created the first line of filters that combined biological, mechanical and chemical filtration in a single system. The Pro Series remains the best filter money can buy. However, the cost is steep, although worth every penny. No matter what external filter you have, 90% of its effectiveness is directly related to the quality of the media used. No doubt the eHeim pro-substrate will colonize nitrifying bacteria faster, faster and in greater numbers than most other media I've tried. The material, sintered glass, has a significant number of sites for healthy bacteria to colonize and the spherical shape increases that number compared to ceramic. washes sharply and the results are easy to see and quick to see. Lower and smaller ammonia spikes, stabilized water parameters, and most importantly, healthier, happier fish. systems - not for external filters) Since you will probably never have to replace them, the medium will pay for itself several times over with years of use. An amazing filler that delivers truly exceptional results - your fish will thank you.