jeffaquarius
Aquarium Advice Addict
Redunduncy is good but if one is only half the capacity then you are taking the risk. You still end up getting a replacement.I don't remember anyone saying two was more efficient than one. But one skimmer is half the work of maintaining than having two. Been there done that. Something to be said about redundancy. If one skimmer fails you have a backup on line. In my opinion it doesn't really matter much. Like having two heaters or one big one.