Review on 🐠 biOrb Classic 15 Aquarium with MCR - 4 Gallon, Black: A Complete and Stylish Fish Tank Solution by Mark Sergio

Looks very nice except for the hose that runs down the middle. It states that you cannot use any other substrates, except for the porous stones included in its composition. I'm experimenting and putting rocks first, then some slate rocks on top of it, and Fluval Stratum on top of everything (because it's porous itself). So far the "pump" is working fine and has no problems pumping air. I'll update later and see if BiOrb still works or doesn't add this substrate (when it shouldn't). In addition, the bricks that come with the kit are not enough. You'll probably have to buy more. If you get the optional LED light, it's actually pretty cool, with a variety of colors and brightnesses to choose from. (as well as the timer).