right then its comming along now stand and hood is made. lights, heater and backgrond are in. a rena exp 3 filter( gone way oversize its capable of filtering 600l i only have 210l ) , another 25kg of ocean rock are on order. this is were i need a bit of advice im going for a black sand , what sort of depth should i go for, what about fitting a undergravel jet system and any advice on fitting one of these . one last thing anyone know of a fish safe 40l barrel .thanks in advance