My 180 has been setup now for 4 months and the little firemouth has only grown about 1/2" from what i can tell. He eats good but is only about 2 inches long, while my oscar is now over a chunky 7 inches, and my 2 sevrums, eartheater, green terror and dempsy are all getting almost to 6. I change 50 gallons a week. All the fish were about 2 inches when i put them in. Any ideas?
