I don't think red ants would have a chance aginst these. They have the advantage of stregth in numbers. I looked at the lable to that amdro and it says that it is toxic to fish and Most of the ants are within 15 feet of the water. I tried putting over and out on the backside of the pond dam to see if maybe they would find it and kill some of them. I don't think it helped any.