Black sponges releasing toxins or gases???has anybody seen this before?

[nata]

I have some black sponges growing nearby my BTA and I saw my BTA retracted and fumes were coming out of the sponges . Is this dangerous for my tank? Anybody?

 

[charlesr1958]

Only when they spawn.

Chuck

 

[nata]

Thanks for the info ! Guess, I will see more of them soon...

 

[tat2z_21]

Now why is it dangerous when they spawn. Or did I read that wrong.

 

[charlesr1958]

Its not a danger in the sense that the spawn is toxic, but as you can imagine, that is a lot of organic matter being released all at once and in an aquarium that may lack the ability to deal with it, it could eventualy create a problem with dissolved nutrients.

Chuck