Bill Cody could tell you just how many different species of algae there are, just waiting their turn to have a go at your pond, but suffice to say there are varieties that like cooler water and some that prefer warmer water.

I don't know if bacteria would have much effect, the most commonly added chemical for algae control is a copper based algaecide. It's important to note that the root cause is usually excessive nutrient load. Chemicals may knock it back, but it will likely return.

Since the pond is new to you, maybe hold off and see what happens as the water warms?

"Forget pounds and ounces, I'm figuring displacement!"

If we accept that: MBG(+)FGSF(=)HBG(F1)
And we surmise that: BG(>)HBG(F1) while GSF(<)HBG(F1)
Would it hold true that: HBG(F1)(+)AM500(x)q.d.(=)1.5lbGRWT?
PB answer: It depends.