Rainbow shark, Ruby shark? Problem. 10 years old!!

[primerdimer]

Hi all,

I have 2 Ruby Sharks. They are also known as Rainbow Sharks I guess. Not sure how it is listed. They are Red and bottom dwellers.

First. I have had them for 10 years so any water problems are okay. Second new fish have not entered my system.

Problem is that the smaller Ruby is being picked on by the larger Ruby. I don't have any other fish in my 40 gallon. The bigger one is over 6 inches wide 2 inches thick. The smaller one is probably 4 inches long.

Maybe is the bigger one losing it????? I am thinking he is going nuts. The bigger one is not eating maybe?? I don't know why they are fighting so much after almost 10 years. Yeah the bigger one picks on the smaller one but today I have had to use a separator to divide the two. What do you think.

I have had the pair 10 years. Why now??? Thanks so much for your advice. No new conditions BTW.

Julie