my goldfish keep dying

Question
QUESTION: i have a 15 gallon tank i keep two to three fish in it i have treated the tank for ike and i put all the water treatment in it why are my fish dying its breaking my kids hearts

ANSWER: hey candi.
i need more info like filters,heaters,decor,how they die,wat r you feeding them and what kind of gold fishand from where.

---------- FOLLOW-UP ----------

QUESTION: filters came with the tank from walmart we are feeding them wardley goldfish  flake food i have put melafix in the tank i have put easy balance with nitraban and aquasafe with bioextract , we are buying the fish from a local pet shop in my town the fish are a white and gold

Answer
hey candi.
too many chemicals and never treat a tank for ich if it doesnt have it.
put the easy balance in and some water conditioner, let it run for 5 days to a week, keep clean, then buy the gold fish if you put them in the same day you buy them they'll always die the water needs to cycle.
do some research about keeping gold fish,maintaining a tank,and chemicals before using them or the outcome will always end the same way.
good luck.