I wouldn't keep a pair in anything under 125g. Even 125g is pushing the limits and on the smaller end. Most would recomment nothing less than 150g for a pair. Have you thought about downsizing the stock of your 5 footer, and moving those fish to the 110L?
I gave my 5 ft one to a family relitave because of the size lol, I had a 60l in the for storage and swapped it with someone for a 120l jewel 800 I think,