Amazon has the Two Little Fishies PhosBan Reactor on sale today for $39. Just grabbed a couple and figured I'd pass along the link. Not sure if you have to be prime member or not.
https://www.amazon.com/Two-Little-Fishies-ATLPBR150-PhosBan/dp/B0006JM0KI/
https://www.amazon.com/Two-Little-Fishies-ATLPBR150-PhosBan/dp/B0006JM0KI/