I stocked 150 4-5" BG in a my pond that previously only had LMB.

I know you are suppose to watch and see what they eat in 10 minutes but the fish are not all aggessively feeding at the surface so I can tell when they stop. I'm feeding Optimal junior from a Texas Hunter set twice a day (moring and evening) for 2 seconds. Pond is ~2/3 acre.

Is there a guesstimate for how much a day 150 4-5" BG should be fed during warm weather?