You can see how tiny they are in my photo. The Brightwater Q-Series on the left is the size of a typical ceramic ring, while the pill-like thing is actually the BC-Series. I've always grumbled about how little options there are for my nano aquariums, but now my grumbling has stopped. 5 Stars. As a bonus, Brightwater is actually near me (WA) and I have all of their filter media. Look at her!
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