I have the spongy algae in my bog, too, but the frogs love hiding in it. There were about 6 at any given time that I could spot. Most of them are in the goldfish pond bog. Loved seeing the little tadpoles, Addy. I have none this year again. Not sure if the toads are not around anymore, or not breeding in my backyard ponds, maybe they prefer my pasture pond... And, only one year had bullfrog tadpoles, and then only noticed them because I was emptying out the bog. Wonder if they are there every year, but I never noticed them. Another interesting thing ... all your frogs are green frogs, and all mine are bullfrogs. It took me forever to see the difference, but now it's plain as day.
This last pic is of a bullfrog that was floating like this most of the day, next to some lily pads. The fish were swimming all around and under him, no worries. The orange/white in the water are goldfish.