Compatible with ALL BiOrb Classic, Tube, Flow, Halo & Life Aquariums. The three Urchins are approx. 2." x 1.5", 2.5" x 1.5" & 1.5" x 2". Also a great addition to non-BiOrb Aquariums.
Compatible with ALL BiOrb Classic, Tube, Flow, Halo & Life Aquariums. The three Urchins are approx. 2." x 1.5", 2.5" x 1.5" & 1.5" x 2". Also a great addition to non-BiOrb Aquariums.