How soon will I have Nitrite problems Jon?
Hmmm. I suppose you could have the sponge out of my aquaclear. Um ... I'm not sure it's a 150 model though. I think it is, but I'd actually have to check to be sure. The sponge size is roughly 4" x 2" x 2".
If you're interested ... I'll trade you it for a fresh sponge... :D
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