we currently have a 72 gallon freshwater tank with Koi in it. while they are ok they are just not interesting enough and are quite dirty. we have been debating converting it to a saltwater tank for awhile now and when we bought the tank, we made sure it would be saltwater compatible later. the pump and filter will be enough to work well with the saltwater. i am curious about what all i will need to get the conversion going? im pretty sure i wil need a heater as Koi dont require one. and obviously the salt to get the water right. as far as coral goes, is it better to have live coral in there or does it not really matter? we are looking to put a couple clown fish in among a few others, cant remember the names of them at the moment. anything i should know about getting one started or maintaining one?