My tank is a 5 months old upgrade from a 40 gallon established tank that I struggled to keep stable. I figured more water would help me so I built a 75g with 30g sump that holds about 25g water. Super low budget build here. I got my tank from petco when they have their dollar per gallon aquarium sale, and built my stand with old lumber laying around my house. It’s got an eshopps hob overflow with miscellaneous brand pumps and power heads.