2 is a definite no. 125 isn't adequate space, you'd probably need like 1000 gallons even then they may search eachother out. Conspecific aggression is generally bad lol. You'd have to get quite a few reds or have a fish that actively serves as a peacekeeper which is quite rare. We've only seen it done with purple wolves. I think he had five in a 150. Reds can be a little more aggressive.
Right on, I assumed so but you never know if you don't ask! Now, a final question, would split a 125 and having a divider be acceptable? Keep a wolf in each half. Or should I just have a single wolf in that tank?