So in my school we need to do a 2 year science research project to gradate, for mine i choose to do something with fish, my question is "Does higher percentages of protein in fish food, increase growth rate? I will be using 2 different types of fish food. One with a 30 percent protien cont.a dn one with a 50 percentage or higher protien content. I will be using 4 10 gallon tanks with goldfish. I will put one gold fish in each one and feed 2 tanks one type and 2 tanks another type of food. I will get the gold fish at about 1in (comets) and keep them for 2 months to do the experiment before they get rehomed. I will be doing 3 trials. Sorry for the bad spelling. Just wanted to bang it out. Any suggestions or thoughts? I am using standard ten gal tanks and aquatech 5-15 filters. I will get some picts up tonight. Planning on starting experiment in about a month.