i had a 620 in my 20g... i PERSONALLY don't care for the seio's.. yeah the way the water is circulated is neat and innovative but I didn't notice any difference in any of my corals, etc... it's just a different type of flow .. any powerhead has the capability of having wicked circulation. it's all in how it's positioned and placed in the aquarium... thats JMO though. Too much seio craze haha
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20g BB Mixed Reef // Coralife 150w HQI // AquaC Nano // Koralia 1 & Seio 820 // Jager 200w // AC50
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