BrightWater Bio Media, Aquarium Filter Media, 99% Dust Free, Ceramic Filter Sphere, Ceramic Sphere Fish Filter for Aquarium, Bio Media, Bio Media Ceramic Sphere, S-Series (250g/8.8oz)

Great Porous Biomedia for reducing Nitrates in my aquarium!

had a loach that would uproot the plants searching for food, these stones placed around the plants solved that. too soon to tell if they aid bacteria growth