Bashsea Bio-Reactor 6-18 = Rated for 75 to 125 gallon aquariums.
Bashsea Bio-Reactor 6-24 = Rated for 125 to 200 gallon aquariums.
Bashsea Bio-Reactor 6-30 = Rated for 175 to 250 gallon aquariums.
Bashsea Bio-Reactor 8-18 = Rated for 125 to 200 gallon aquariums.
Bashsea Bio-Reactor 8-24 = Rated for 250 to 350 gallon aquariums.
Bashsea Bio-Reactor 8-30 = Rated for 325 to 500 gallon aquariums.