A**R
Great for what I use them for.
I’m using these on the bottom of my pond filters and skimmer filter. They stacked nicely and a very lightweight so it doesn’t add a lot of weight when I have to lift the filters for cleaning.
R**F
Well worth it
Works very well and a way better price than others. More for the dollar
B**Y
Good buy
Good buy, increased PH of aquarium, my Flowerhorn happy!
A**R
Good value for your money
Perfect very porous
C**Z
Good quality biologic
Great for establishing biological filtration; lots of surface area for natural bacteria.
D**E
Just as Described!
Very satisfied with this product. A good amount for the cost.
