Here is a review left by a customer on a product. Would you say he was satisfied or dissatisfied?
Title: good biological filtration
Review: I love this. I was adviced to run 1 sponge and 2 bags of biomax on my aquaclear filter and it is great. The only time that you ever need to run carbon is if you are trying to remove medicine from the water, other that thoes rare times you should run 2 bags of biomax to increase your benefitial bacteria colony. My only regret with this is that I did not get another bag. You never need to replace this. It is very bad for your aquarium if you throw away your benifitial bacteria.
