Great offer for a guesthouse with bacteria! Make sure you understand this is not a polishing filter for your water. If you've done a little research on keeping fish, it's for beneficial bacteria growth/property placement lol. I put it on a dual outlet aquaculture pump and put a splitter on top to feed both to the same air inlet. It only took about 1 minute for the air to pass through to catch the rhythm. Works as advertised! Don't expect bacteria to grow on it right away. These things take time!
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