Bought two YTD in the wk, and they r dead today. I put a previous thread sayin they werent movin much and they looked to b breathing heavily. Nw i was told to check which i took to my local fish place where i bought them frm, they said all levels were fine had the tank bout 3 weeks gt a heater which is set at bout 26/27oc the only thing tht iv heard is the oxygen levels i have an internal filter it is a 20 gal
tank. I wud like to knw wat cud of happened as i dnt wnt to put anymore fish in if it cud happen again.