I feed my koi three times a day I got them at three inches and now they are six inches with beer bellies, should i get them more fiber, they get fed koi pellets, or is this normal, they swim normally except at night they tend to run into things at night. Right now the pond temp at its highest is 88f and low 80's to high seventies at night. water parameters are perfect. water is clear but is tea colored water due to acorns.