Thanks i got a new firestone as mine was old and added air into the powered as they were all gasping for air.... They gave been doing that for a while might need more pumps..... On closer inspection there seen to be less spots on the fish . I true a tiny bit of food today no takers i also done a slightly higher water change about 40% i also didn't dose the full amount of salt as as i didn't want to shock them as i don't use salt normally . So fingers crossed and thanks to everyone who advised