hi can anyone help i recently bought two 12cm barra (7 weeks ago) they have been fine up until 3 days ago one started to just lay on the bottom of the tank and change colour and then died and now the other is doing the same.My water levels are fine theres no wastage on the bottom of the tank .I went to my local pet store and they have told me to add 1 and a half cups of tank salt over 24 hours .All they have been eating is feeder fish (2 WEEKS AGO) AND CARNIVORE PELLETS EVERYDAY. Please can someone help i dont want the other to die
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