OK, so a quick update.
The tank is up and running, the sand storm is gone and my cat has attempted to get into the tank (she was after the string from my algae cleaner which I accidentally left in the tank and was blowing in my powerhead current!)
OK, now the serious stuff..
I tested the water today and was seeing very little ammonia and off the scale nitrites and 20ppm Nitrates...just wanted to check to see if that should be the case...bear in mind I only have 2.5lbs of fully cured live rock and 40lbs of dry base rock, as well as live sand.
I do not have the calcium and alkalinity tests as the place I ordered them from sent me iodine and magnesium tests instead....awaiting a reply as to whether or not I have to return them...fingers crossed not as they cost a lot...maybe they will be nice because of their error.
Should I be doing water changes now? I have about 15 gallons of ro/di water made but no salt mix mixed. Been topping off with that to replace evaporated water and lower the SG slightly as well was 1.028 now 1.026 and stable. Might be slightly off as I am using a swing arm hydrometer and not the refractometer which was missed off my order as well.
Sump is all complete, awaiting the silicone to cure on the baffles...I am doing a DIY overflow but in my stupidity glued the T-piece from the return line / return to sump line, the wrong way round..basically rendering the overflow useless with no way to fix it other than start again.