Ceramic Bio Filter Media Vast Surface Area for Aquarium Sump Canister (1 Box / 24 pcs)

Perfect size for my aio, in addition to the 4x4x1 bricks it created the perfect platform for holding up my smaller medias flat and neat. Water’s Crystal with my mix of media

Tremendous surface area on each one awesome for a sump to really hold alot of beneficial bacteria

Very rough so should hold beneficial bacteria well. Stack nicely. None were damaged. They are light weight so I had to weigh them down with a rock. Well probably get mesh bags to keep them together and heavy enough not to move.

I have used a stacked pile of these inside the filter box of my shrimp aquarium and ammonia and nitrate levels, etc. have been undetectable, which indicates that they apparently work. There appears to be a large surface area, which helps make these work well. I have stacked these in an alternating crisscross fashion to help promote water flow between the blocks.

Fit well in tiny sump! Looks great! Pretty inexpensive! Probably double whatever quantity you think you need. I probably could have used more.

Use this product before and never had a issue so decided to go with it again

Product is well made. The porosity of the blocks seems to be a good size. A lot of these type block are fragile, these are well made very well with very little chipping or degrading. Economically priced when compared to others.

This media lasts. And works fast. I have quite a bit in my sump.Easy to openEasy to use.Follow instructions.