Review on Optimized Marineland Replacement Bio-Wheel for Eclipse 2, Emperor 280B & 400B Filters - Top Quality Parts for Aquariums by Janet Rivera

Good price, good product. There is not much more to say about this. Yes, it is only 1 filter, the name is "Emperor" and "Eclipse 2" filter details, not "2 filter details". Before purchasing, please note that they cannot be replaced unless damaged. They will collect a lot of bacteria, look dirty and become much slower over time. This is exactly how they should work and means you have healthy biofiltration in your tank. Should they ever get so wet that they can no longer turn, simply rinse them gently with aquarium water.