That really isn't enough water changes. Try like 50% a day. Also your plan will not work. your fish will eventually start to release chemicals that will keep them from growing because they can grow and wont be able to fin in the tank.charlie_brown15 said:no im not returning them the pet store said that they would be alright together, the tank is 4ft and once the fish get to big for the tank i sell them back to the shop and get double the amount i payed for them back. its my little plan
ps i also clean it out everyday 10% then on wednsday i do a 25% water change and a 50% every 2nd week.