coffeetwitch
Aquarium Advice Addict
hello, i am wanting to put two of these on my 90 gallon freshwater, one for mechanical (522) and one for bio filtration (506). i want to run marinepure, either the 1.5" spheres or the 2" blocks. still not sure which would be better for my application. i have not yet purchased the filters or media. i would prefer to have too much bio than just enough. my questions are: how much bio media do they hold? will that be enough to support a heavily stocked tank? thanks