The Arowana is a very big but graceful fish which makes a really exciting freshwater tank inhabitant. beams: The beams act to support the ground joists. These beams may very well be built of huge-flange steel beams (generally and incorrectly known as an I-beam) or they could be wood triple https://aquarium-setup-tips67765.laowaiblog.com/36260591/aquarium-setup-tips-fundamentals-explained