Yuri - Great looking trigger. The only reason I have never kept a GB trigger is the fact that they come in 12+". I had a chance at one that was 6" and passed due to my current tank mates. GB triggers are VERY active and due to the deep waters they are caught in deserve colder 70 an below temps.
In addition, I think that the 700g tank will be the only one inwould put a full grown GB in with a ton of rocks for him to hide.
Amazing specimen though! Good luck