pond sealer

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    All Fish Behaving Strangely After 3D Background Installed.

    Hey everyone,    I have a bit of a crisis at the moment,    I recently installed a 3d background in my aquarium, it's made from Styrofoam, covered in cement, then sealed with crommelin Pond Sealer.  I glued it in with selley's aquarium safe sillicone and waited for it to fully cure before...