isnt this hobby so great lol. theres 100 posts about how pothos are toxic to fish. but we know its not a problem. its unreal how much up and down information is out there in the aquarium hobby. im going to do some testing and i will record my results for this post.Personally I would do more testing in an isolated setting without fish and see what it does to the water. From a quick search I didnt get a clear answer to how toxic it would be for fish but found most people advising against it on different forum posts about Hedera in aquariums.