Review on 🔹 EHEIM Substrat Pro 2L - High-performance Biological Filter Media (Sintered Pearl-Shaped Glass) by Maria Ward

good stuff. A 2 liter box fills a bowl of my SunSun 303B canister filter. My kids (ie me) inherited a 20 gallon tank with 5 goldfish in it and as everyone knows it's a VERY bad overkill. As you can imagine, ammonia, nitrite and nitrate were above supercritical levels. Took a cheap Sunsun canister and put some in it. I did a few water changes to bring all levels down right away, but now that I have a few trays full of this stuff my ammonia and nitrates are ZERO! Is always. I still have to change my water twice a week to keep nitrates in check, but it's not a big deal. Note: It looks like Sunsun's is just a rebranded JBJ Rector made by the same company. If so, then these Sunsun canisters are probably better than the price suggests. You may be asleep. In any case. This is a review for another site.