If that senegal is a really big eater and active, then no for 2 years, maybe 1 year. I can see a senegal reach about 6" in one year if it eats a lot. The swimming space of 3 feet is a bit small. I had to section off my 4 foot 55g, and when my polli (about as active as a senegal) was 6", it became less active at 3 feet of swimming space. When I removed the barrier, it was back to being active. That 1 foot made a difference.
The severum will dictate if it will allow the senegal freedom. It's 50/50 chance that you are taking. With a larger enough tank (more than 3 feet), the dynamics could be great and the severum will tolerate the senegal.
The severum will dictate if it will allow the senegal freedom. It's 50/50 chance that you are taking. With a larger enough tank (more than 3 feet), the dynamics could be great and the severum will tolerate the senegal.