Hibiscus: Opinions please..., 1 by MacFL

MacFL wrote:
G'day all!

New to gardening and growing Hibiscus. I have two President Hibiscus trees planted in my garden, (about 2 weeks now) and today, I was looking at the flowers and I swore I saw a small greenish bug sitting on one of the flowers. It jumped or flew away quickly so I didn't get a good look, but it was smaller than a grain of risotto. Further inspection of the leaves revealed holes in numerous leaves and some white film on the underneath side of many leaves.

I am pretty sure it was an Aphid that I saw, and from what I can tell, the holes in the leaf (macro photo posted below ) match those done by the Aphid.

Can someone please confirm this and tell me what is the best and safest was to rid my trees of them?

Cheers,

Mac
LBK, FL
Zone 9b