Right little bit of an update, I was woken this morning by my partner shouting my name up the stairs. Some how one of the seals had broken and the tank was seeping was very slowly.
So got on the phone to the LFS
and they agreed to a refund or exchange so took the exchange.
When I got there I was told that they didnt have any of the Tetra Aqua Art 60 Litre tanks that I had bought left so was given a nice one made by a company called AA Aquariums/Fish R Fun.
Its 100 litres and came with a cabinet.
So got home, checked on the fish that were in various jugs and Pyrex dishes in the kitchen (which they were).
I had decided to change over to sand / fine gravel so gave it what I thought was a good wash and then put it in the new tank after rinsing it out well.
Then I put as much water from the old tank as I had been able to resuce into the new one but when I had filled it up it went really cloudy. The fish are in a spare 60 litre tank of my friends for the night, so basically my question is how long will it be before the water isn't cloudy anymore?