Betta Stress Help?

[VulcanNinja]

I recently put my 10 gal and 5 gal tanks side by side. CHeck my sig, i have a female in one and male in the other. They flare at eachother a lot, and stay near the glass where the other one is a lot of the time. The male is starting to show signs of mild fin rot. Do you think this is stressing him out? Should I put something betwen the tanks?

Actually I just installed a new filter, and the water is testing a little off. nitrate is 40, nitrite is 0, hardness is 120, alkalinity 80, ph looks ok - could this be the problem?

 

[riogal_11]

Seeing each other all the time could very well be causing stress, which leads to things like fin rot. Let them see each other sometimes, but not constantly. I'm not real good on water paremeters, I just know what they are supposed to be and that's about it, so someone else will have to let you know about that factor.