[Debz87]

Thanks very much for the info, so a bigger tank asap would be good then?!
How do i get the carbonate down?
We are going to clean out the internal filter tonight, we did the external when we had to move the fish and it was disgusting, the internal filter on the very odd occasion lets out a plume of bits into the water, i have seen it do this twice in a week, i assume it shouldn't do that?
So as we have that many fish, they are all under 2 inches at present what tank size would you recommend?
The current tank is 4ft by 1ft by 1.5ft.
I was thinking of looking for a 6ft by 2ft by 2ft, not sure what volume of water that holds but thought that would be enough.
I would love to go bigger than that but we live in a 1st floor flat and am a bit worried about the weight, the one we have at the moment is positioned in front of the window where i believe the metal structures of the building will be.
We wanted to get a few more fish as well, nothing that will get very big, would like to get a mandarin dragonette and a dotty back or similar.
I take it adding more live rock is a good idea? Is there also any plants that would help keep the nitrates down?
Thanks for all the advice so far!