View Full Version : BK Mini 160 and sump flow

10/19/2016, 06:07 PM
Looking into upgrading my return pump to a DC. Just curious in knowing if different flow rates thru sump effect skimmer performance. For example: slower flow rate better for skimmer and contact time or faster flow better for turnover rate and new water goin thru sump for skimmer to skim. Or it doesn't make a difference
Please advise

10/19/2016, 08:25 PM
Not really. Some say that if your skimmer flows 300GPH (example) any more flow is a waste. At the end of the day, the skimmer can only remove so much dissolved organics anyway.. At the end of the day, set your sump flow for a minimum of 4x the display volume which is kind of a rule of thumb and you will be fine. Personally, I prefer higher flow rates through my sump but I've deigned my sumps to handle high flow rates. At the end of the day, as long as the water is flowing through the sump, the skimmer will remove the dissolved organics. If you have higher flow rates into the sump, you will have more of the dissolved organics passing through for the skimmer to remove faster.. Of course there is a point of diminishing return in terms of how much the skimmer can remove but as I said, at the end of the day, the skimmer will keep your dissolved organics consistently low regardless of the flow rates provided the flow isn't trickling into the sump and organics getting trapped in the display.