- Joined
- May 21, 2014
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- 3,278
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- Location
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- What state or country do you live in
- Florida
Yeah, the OP has a 20G. So it's probably not necessary at this time to use these medias, if ever in that size tank.FYI I have 81 gals water volume.
If you start to have issues with algae from the rocks, let us know. There are other methods to remove it as this wouldn't be a permanent problem, needing a permanent solution.

