Yellow Silicone? Thats not right…

[FishyFishy!]

That has happened to one of my sumps back in the day. I still don't know why. Did you put any chemicals in the water when it was filled?

[yellowworld]

Originally Posted by FishyFishy!

That has happened to one of my sumps back in the day. I still don't know why. Did you put any chemicals in the water when it was filled?

not any that i can think of, i put a vinegar and water bath through it for a day then after rinsing everything out i put a saltwater mix in, its old salt though from my last tank, I gave it all a good shake to mix things up again but do you think the salt might have done something? Is there a use before date on salt haha

other then that I can't think of anything that might have effected it like this - chemically speaking