Review on Brightwell Aquatics Xport BIO Block Biological by Rebecca Hughes

Thanks to my knowledge gained in practice, this Bio Block is a total letdown .Despite the promises on the package, it barely makes a difference in my aquarium and actually worsens the water quality. i purchased it in the Pet Supplies section and wasted my money. The concept is good, but the execution is poor, leading to a negative impact on the environment. The only pro is the size, which fits well in my filter, but that's not enough to save this product..