It's better to start at the lowest end, and slowly add in when need as the 3 to 4 of the tigers cannot keep up with the bass population control. Only add in 1 tiger at a time after a 9 months period, until the bass population falling into a sustainable balance.
Since you've chosen your method of approach, ring master of the tiger muskies, make sure to monitor your reservoir more intently. Like I said, it's either male, or female, in which you are positive of your skills in identifying them. Males are aggressive, as we've indicated, and very territorial. Add them in at different part of the reservoir, and only add more in (1 at any given period of time after the initial 3 to 4 males, or even 5 females at max for this time).
With an abundant of food source, those 12 inches will be huge in not time after one full year. With such large bass population, why not try the 4 males for now, or 5 females. Your call. 12 right off the bat, you're going to have fun hunting the monsters down later if you need to do some damage control.
