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jacksonmills posted on r/shrimptank4w
Another nice thing is if your HOB is in the AIO container, the bubbling won't disrupt the surface over your main tank. Which means you can oxygenate it AND have plants that do not like to be disturbed (like Frogbit/.RRF) I use this stupid small one from Amazon https://www.amazon.com/dp/B07XZ831WR?ref=ppx_yo2ov_dt_b_fed_asin_title It's nice because it comes with a suction cup and is super tiny