Hey guys, I have a Waterland tub (Just like this one, but not the same dimensions Waterland Tub-Small Water Enclosure). I would like to turn it into a saltwater deal. Currently it is being used for my snapping turtle, but I think its too big for him as he cannot catch the fish, and he doesnt take advantage of its large size, so hes gonna move, and then I will buy him something different. It currently has some small fish in it, they are 15cent fish, but they are not the guppies, I forgot what they are called. If they are unable to adapt to saltwater I have a spare tank with an Oscar for them . I think the water goes JUST above 1ft or so and it is about 4ft long, with about 3ft being water and 1ft being land and about 2-2 1/2ft wide. So my question is, after I get everything set up, what kind of fish could go in the conditions I have. Also, if its 1" fish per gallon (As the rule I've heard with Freshwater), does this include non fish like sanddollars, coral or other living things? Now, im off to research how to setup/convert to saltwater. Any tips would be appriciated as this is my first time looking into setting up saltwater.