yes, it is "supposed" to be fully submerged. mine is completly under water and about 6" of chord is submerged too. just make sure it is a fully sunmersible powerhead, i've never herd of a non-submersible powerhead, but hey, they might be out there
A forum community dedicated to Piranha owners and enthusiasts. Come join the discussion about breeding, health, behavior, housing, care, classifieds, and more!