9 Frogs is a ton in what is roughly a 42 gallon aquarium. What shape is it? Hex? I would remove the kuhlis too. They look like works. I am surprised they are not already eaten. I can't offer much advice on top of what was given. I am curious if you feed the daphnia frozen or thawed though. I can't see how they would get enough if thawed because it is so tiny and goes everywhere. I would avoid the cooked shrimp too. You should be feeding raw.