Thanks everyone.
I thought I'd add a little more about the equipment.
I use 6 x 80watt 60" retro fit t-5's (from reef geek)
Octopus 220 NW protein skimmer (have had it for 2 years now and it may be on the small side but I like it).
I am using a 55g as my sump.
I also have a phosban reactor where I switch between nitrate sponge, gfo, carbon.
I use a Quiet one 4000 as my return pump.
In addition to the return pump I have 4 Koralia's (I think 3 are Koralia 4's, and 1 is a Koralia 3)
I think that about does it