May 30, 2021 -I've been using thehygger wavemaker HG-951on my standard sized 29 gallon for a couple months. It doesn't put out noticable flow past 12 inches, but in a pulse mode I do get a back and fourth flow in parts of the tank.
September 13, 2021 -In cases where you have adequate filtration but need a little extra flow in a stagnant corner of the tank, consider adding a simple air stone with an air pump. The bubbles from the air stone move water as they rise and create surface agitation when they pop. If you have slow-moving fish or baby fry, the Easy Flow sponge filter can provide sufficient water circulation without stressing them out. For larger aquariums or fish tanks that need faster flow, a power head is great option because of its versatility in multiple applications.

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April 13, 2019 -... Thank you, I've been considering one and hadn't realized it may have an impact on the plant growth. ... Of course!! I went with theHydor Koralia Nano Aquarium Circulation Pumpfor my 29G.

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December 12, 2021 -I am looking at the sw-4 to go into my 6g mushroom tank. I haven't seen the size in person but it looks to be pretty small. ... I have a Hydor Koralia Nano 425 on my 24g cube. The pump works just fine but imo it’s a bit big and harder to hide in the display. From a quick search online, it looks like the 240 is about the same dimensions. Knowing that, I’d probably try to find something a bit smaller.
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