There always seems to be a new biological media available.
As mentioned in another thread, MarinePure seems to be receiving some traction in other forums
I am intrigued by this product, but would like to know from others what their thoughts are.
BRS sells it:
https://www.youtube.com/watch?v=ByTzKjqYA2U
It comes in a variety of different sizes/shapes
http://www.cermedia.com/marinepure-products.php