Schgred
Aquarium Advice Activist
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- Apr 13, 2013
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- 148
I just happened to see this today. This pic is the best I can get a this was taken from the back of the tank. Is it a sponge? What's up with the hole?
Sponge? Or something else?
- Thread starter Schgred
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Schgred
Aquarium Advice Activist
- Joined
- Apr 13, 2013
- Messages
- 148
Are sponges like this a good sign? Or just to be expected in a reef tank?
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