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

Probably a better, more versatile biocarrier. It is a good size, the size varies from 5 to 7 mm. It appears to be a very porous surface. Compared to other media like ceramic rings or Seachem Matrix (I bought a large amount of Matrix and the material seems to vary a lot even what looks like rocks and shale. Will not slip through Rena XP shells. Will not cut media bags. Has a relatively long lifespan, the balls will degrade within a few years.(Faster if you rinse more often) (You will notice a small sand-like quartz sand at the bottom of the aquarium.