Update, so I now also have space in my 125 after having the sell my platinum senegal after he started attacking my hemibagrus. I am debating weather to keep the mystus in the 125 or move him back to the 55. It would allow even more space in the 125 but he does look majestic on the rare occasions he cruises around the tank. Anyway here is crappy video of the hemibagrus eating.
http://instagr.am/p/Bwz26JRgOHg/
http://instagr.am/p/Bwz26JRgOHg/