Modifying sponge filter weight?

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Scouser

Aquarium Advice Addict
Joined
Oct 11, 2011
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Scouser on tour, Scarborough UK
Hey all, I recently bought a mini sponge filter to fit in the 15litre cherry shrimp jar I'm planning.

The spout seems to narrow as it goes down so while the filter gets jammed half way down.

Anyway I wondered if I could just shave away till it fit? Or are they filled with shot which would leak everywhere?

Thanks!

I'll update with some pics soon!
 
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