I've utilised crushed coral and sand. When your going to use sand get lots of snails to help keep it thoroughly clean, you don't want being vacuuming it or stirring it up,it make a mess!! beams: The beams act to help the ground joists. These beams may be manufactured of https://aquarium-setup-tips11098.blog2freedom.com/37439126/examine-this-report-on-aquarium-setup-tips