Chad, if you haven't felt any effects from the swimming in it yet, you're probably fine. However, probably wouldn't do it again until it's gone. Definitely wouldn't let the dog swim in it since he doesn't know any better than to drink it as well. I'm certainly not an expert either, but from everything I've researched, small doses of blue green algae are typically not harmful, but if they are it usually shows up early after exposure.
