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Originally Posted by niloc16
wow, now that is some flow. so in other words 15X is inadequate.
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Based on your signature.... for the contents of your tank 15X is fine if you are not noticing any crap collecting... try to remember to clean your rockwork every once-and-a-while with a turkey baster and you'll be fine.
If you are looking for more nutrient poor systems then it is beneficial to have lots of flow... I plan at least 50X turnover for my BB 120