My main problem this year has been toads! I have had dozens! So much so that I have had to relocate many. They are hard on my plants along the edge of the pond and I have scooped out more toad eggs then I can tell you! I would guess that that many toads also have an effect on my water quality. Lots of extra poo. I have also scooped out 4 dead semi bloated toads in the pond. Probably drowned from to many males. Seems like I am anti frog and toads here. I dont mind them in moderation but the amount I have at my pond has been ridiculous! There are creeks around here but farm ponds and backyard ponds, not so much. I would love to keep them around for the bugs but there has just been an overwhelming amount of them. There is still plenty of tads in the pond now. Cant get them all. So I imagine this will be an ongoing problem for me each spring.