Ron Hudson Posted February 22, 2021 Share Posted February 22, 2021 Setting up 125 g planted tank w/ 3 large sponge filters. cgoing, Have 2 large wood pieces each end of tank. Bought wrong circ pump which was 2000 gph which "Hurricane Katrina" in my tank. How many pumps needed? What flow rate? Leave on all the time or put on a timer? Any recommended learning sites? Link to comment Share on other sites More sharing options...
gardenman Posted February 22, 2021 Share Posted February 22, 2021 How many pumps needed? Arguably none. The three sponge filters will prevent stagnation. Most aquarium plants come from largely stagnant ponds/pools or slow moving streams. If you have catfish, plecos, or the like, they'll keep things on the bottom stirred up and moving. If you're injecting CO2 some extra circulation can be handy to disperse it more evenly through the tank, but even that doesn't take much. Most of the wave maker type pumps are more designed for reef tanks where you have waves breaking over the reefs. Most of our freshwater fish never experience waves or super strong currents. Plecos, and hillstream loaches being the exception. Most of the typical aquarium fish just meander about in largely still water. If you see gunk building up someplace you can vacuum it out during a water change. Link to comment Share on other sites More sharing options...
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