06-19-2007, 03:45 PM
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It isnt the type of filtration that really matters if you have a true saltwater tank the filtration consist of skimmer, live rock and a deep sand bed. A major factor is if you have a sump or refuge is how big are they. That would lead to water volume. The more water volume you have in a tank the better. I have a 120 gal main tank and a 65 gallon sump. I have about 180 gallons of water. I would say if you want to keep the clowns and get rid of the gobys. Or better yet keep what you have and not add anything else and constantly do water changes and test your water weekly to make sure norhing gets outta wack. I would never down size myself but everyone is different.