Hi was wondering what size sump for 180 gallon tank. How many chambers should I have planning on macro algae refugium protein skimmer gfo reactor return pump. It's bin awhile change tank size 150g to 180g planning on tangs, so do I need other reactors like phosphate reactor, calcium reactor planning on a mixed reef tank. And what about external pump for sump. Also planning on ato resoviar any suggestion advice on sump filter socks. I visited live-aquaria website and got tank size needed for tangs my build is slow because I want to be shore of equipment setup I want. Thanks