Louise make sure you read the sticky about cycling your tank if you havnt' already.. lots of waterchanges and dechlorinator for your water will help your fish survive if you have just set your tank up.
thanks smallfishi, i think im cycled now its been 8 weeks and am doing 30% changes twice a week with dechlorinator aswell, things seem to be going well
although i think they look more like the parkinson one