Join Date: Oct 2010
Location: Victoria, Australia
Definitely not normal.
Your common goldfish are going to be majorly stunted in a tank of that size. I have personally first-hand seen the results of stunting caused by a too small tank as my poor goldfish is only half the size it should be.
You have to realise, in ideal conditions, a goldfish can reach its adult size in only 1-2 years.
Keeping five potentially tank-busting fish in a 22 gallon tank is a recipe for disaster. I would suggest maybe rehoming or finding someone with a pond that could take them in.