As a far-from-home California lover I want to make one of my tanks beach themed. I picked up a sandcastle, beach ball, and beach chair ornaments from Petsmart, and I want to get one of the tall palm trees too. They sell bagged seashells said to be safe and non-toxic, but has anyone used them before? Also does anyone have any other ideas how to make it even more beachy? I'm not looking to do sand substrate though. And a beachy background maybe? I don't think Petsmart has one... Or any fun plants? Thanks!