should i buy it to put on atach to my fluval 304 that im using for a fish only saltwater tank. im confused i dont know what to do. should i sell my fluval and get a wet dry filter with a protein skimmer or just add a protein skimmer to my se up. THIS IS WHAT I HAVE I JUST STARTED A SALTWATERTANK NO FISH YET IM USING THE 304 with a power head 70 and thats it. IM GOING TO PUT LIVE ROCK SOON BUT NO CORAL. WHATS THE BEST THING TO DO.