55 gallon freshwater south american single specimen show tank i have a fluval 405 9 watt uv twist sterilizer and a coral life ro ..... i had 2 aquaclear 110's but the current was a little much without need...... people say sump are the only way to go but i disagree ro water and uv is totally clean and easy i have a bunch of live plants along with co2 so i dont see where i would need a sump i like having room to play with where the sump is the sump u kno......