average age

[Eddie]

I'm sure there are many elements that affect the size of Discus. Things like water quality, diet, ginetics, tank space, etc. I am just curious about the possible age of my fish. They are about the size of a quarter, not including the fins. One of them is about the size of a half dollar. Any idea how many months these guys might be? Just a wag? :o . Imagine they are the healthiest fish alive with superior upkeeping.