hygger6.2-Inch Long Aquarium Bio Media Ceramic Filter Media Blocks for Sump Tank Pond Saltwater Aquarium Fish Tank Biological Media (7.9 lbs,40-Pack)

I bought these for my. 300 gal garden pond. Packing did its job, none were cracked or broken. I’ve tried various types of media. Like this style the best: it’s large surface is easy to pack /organize in my bio filter, theses tons of surface area for the bio bugs to take up residence, can be broken to fit if needed. I’ll never buy the little style media again. Decent price for the quality. Highly recommend

I got 1 box, and then a 2nd, no bricks were broken, the second had slightly different packing not that it seemed to matter.They stack well and work, on end, or flat. They are a little more than 4x as long than wide, I put over 50 on end, under my sump filter box, and then set some on edge/flat in front to keep the others standing. my thought is the water entering the sump will flow into the holes and around the edges of the upright ones for maximum penetration and bacterial filtering. Though ceramic/brick they are light weight, and a strong current can push them, especially if trying to stand them on end. Properly set up, they are stable and stay in place.I also got some of the round ones , they compliment each other, a touch wider and stack differently, both are the same length, I have more of these (the square/rectangular) in my sump.

Bought these bio bricks for a custom 40 gallon sump that I was building wanted something that was easy to install and clean great value for the money buying in bulk definitely had more than I needed. The bricks are very functional and easy to stack instead of other types of media.

Good

I was very impressed when I opened the box, I have a 4x8 marine pure bio brick in my sump that cost $50 and this box is it probably equivalent to 3 or 4 marine pure bricks and no they do not melt or crumble especially compared to other similar products these are pretty sturdy

It’s for freshwater only… it says right on the instruction manual idk why this is advertised for saltwater

Bought these for my small goldfish pond. I had always used media similar to these in my aquariums and they worked great. Managed to fit 36 of them into my gravity filter, beneath the washable filter mat. The remaining 4 went into the upper part of my small waterfall. Now we just wait for the beneficial bacteria to establish itself. Very porous and great size. Easily broken into smaller pieces to fit random small crevices (Such as my round gravity filter). All 40 arrived in perfect condition, not 1 was broken.

You don't mind the fragility, these two catch a lot of sludge and algae.