Adding 2 clown fish after 1 went missing, thoughts?

[JPags]

In my main tank one of my clown fish went missing (The smaller one so i assume it was the male).

I have 2 clown fish in my basement tank and was going to move them to my main tank and see if they get along.

Just wondering if im asking for trouble with my current clown. They are all about the same size so I was hoping they would get along but thinking I might be wrong about that and I am better off just buying another clown to go in the main tank.

Let me know if you have ever mixed clowns like this before.

 

[dz6t]

How old are they?
Are they the same species?

 

[JPags]

One in main tank are around 4 years old. Still small since I got them really small

Others are about the same size

Yes they are the same species

 

[dz6t]

4 years old will still work.