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Discussion Starter · #1 · (Edited)
As title, I've got approx. 7L of used ceramic bio rings for sale. Theyre the cylindrical looking white ones.

I used them all, enough to fully fill up all 3 trays in my xp4 filter.

Took them out of my filter and they're in a zip lock bag at the moment, so they shouldn't have any bio left in them by the time they're sold.

Don't know what I'd want as a trade. But looking to sell for $30

**looking to sell all together**
 
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