The adverse effect would be turbulance or the disruption of the establishment fertilized or not. Not too much air(ation) but perhaps too much circulation.Lets say you have a 4 head diffuser in 20 ft of water with 1 cfm to each of the four discs.The tested lifting rate states 10,000 GPM or 14.4 million per 24 hr day. It can be difficult to establish a bloom in that much circulation if that station was not sized correctly to that specific body of water with the establishment of a bloom in mind..1/2 per day turns is enough to aid in establishing a bloom if aeration is going to be used.Regulating the speed of the system is more water temperature related. The catch 22 being the more you circulate the warmer the water the less the DO holding ability.Under aerating or circulating can help aid a bloom in a nutrient rich mature pond by hanging nutrients in the water column and making them available for planktonic algae or can go right to FA also. This is also the reason to be careful when underaerating if nutrient reduction is the goal.Your comment about the corelation between circulation and the performance of the bloom would make for a good study.There are so many uncontroled variables that this would be difficult,but still interesting.If a system has the ability to turn at least once per day (which is the minimum I size for) then I suggest slowing it down if bloom establishment is a problem.This method seems to work.
