bout 2 weeks ago i bought two fantails 1in each. there in a 10gal till they big enough to go in my pond with the others. but today one of them wasnt eating and now its laying in the bottom. no fin rott,hole in the head, ich, fungus or dropsey. it might be constipated? do they act like that when constipated.i would try to feed it peas but it don want to eat.nothings wrong wit da water i do 20% waterhange a week. no food gets left uneating hlp tps plz.