Sponge filter weight material leak

FinalFins

Member
I inspected my sponge filter today during the cleanup of bladder snail eggs and. I found this- haven’t seen it before. My sponge filters are second hand so they are all cracked at the bottom with rust sealing the crack- used it like this for a year, no casualties I know of directly related to this issue- but I found this black liquid or material of some kind leaking out- it seems to have stained the bottom, and if you smudge it hard enough the stain stains your finger- I’m fairly sure I don’t want this so I have backup sponge filter weights to replace it with-
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Can someone identify what is leaking out?

 

StarGirl

Member
If you have a replacement bust it open and find out! I couldn't find anything on google either.
 

Betta'sAnonymous

Member
Definitely makes me want to never crack one of mine
 
  • Thread Starter

FinalFins

Member
StarGirl said:
If you have a replacement bust it open and find out! I couldn't find anything on google either.
I'm thinking of taking the defective one and taking a hammer & nail to it but the possibility it could be something like lead or some heavy metal?
 

Fisch

Member
If it had cracks for some time it could be oxydation or moldy gunk?
 

Cody

Member
My guess is that it may be from the water getting inside and that is whats growing inside of there.

It would be interesting to see what is inside of there - I wouldn't worry too much if you were to find it was lead. Obviously there are health concerns associated but that is going to be more with long term exposure.
 
  • Thread Starter

FinalFins

Member
Maybe I'll crack it open tonight. for the meantime I've replaced the part (thank god for spares)
 

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