I have a 220G tank.its 3 months old but it was an upgrade from a 5 month old 90G tank .(70% water and 60KG of LR was recovered from it ). in this 220 tank i have 51 fishesh, +30 inverts and around 25 corals ... fishesh are in all sizes , from a fully grown 15cm Blue tang to a 4cm small Damsel ...