Hey scr, I'm completely new to the saltwater fish tank hobby. My friend was kind enough to give my 10 month yr old son his 75 gallon uniquarium that was brand spanking new. So I been spending a ton of time at my local fish store and decided to join SCR for questions. I been cycling my tank going on three weeks now. Testing levels at my local store. Everything seems to be in place except for the billions of tiny air bubbles that comes out from the return pump. Any ideas of might be causing this? Thanks SCR and I'm pretty excited about getting my tank started. I attached pictures of my setup.
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