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What's in my toilet tank?

3 months ago

There is green stuff growing on the insides of my toilet tank. You can see in one photo that it is thick in places - it's squishy if you touch it (I didn't touch it with my hands!). We keep the lid off our toilet tank (because the toilet doesn't work properly and we have a temp fix that requires it to be open) and it's appeared since we started doing that. Any thoughts on what it is and how to get rid of it? Thanks!

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