Silicone turning yellow

[jorge0912]

I used some silicone ge silicone 100%
And now my silicone is turning yellow for some reason I used it to seal a baffle on my sump anyone ever had this happen to them is it safe IMO in trouble I was told this was safe now I am panicking I can’t afford to start all over again :”(

 

[Peace River]

I used some silicone ge silicone 100%
And now my silicone is turning yellow for some reason I used it to seal a baffle on my sump anyone ever had this happen to them is it safe IMO in trouble I was told this was safe now I am panicking I can’t afford to start all over again :”(

GE silicone 1 is commonly considered aquarium and reef safe - it is important to use GE 1 and not GE 2 (type 2 has a mildew additive). I have used it on several tanks (both freshwater and saltwater) without issues. Does the yellow wipe away? It could be some type of diatom or algae. Additionally, have you done any dosing that would cause staining on the silicon? Although not common, this is not the first time I have heard of this happening.

 

[ca1ore]

I have had this happen on a few occasions with clear GE1. I’ve found no acceptable explanation for it. Good news is that it has not been problematic for me. I wouldn’t worry.

 

[wesman42]

Discoloration is normal for silicone ime.... At least in the sump, especially a refugium. There's probably all kinds of life growing on it!

 

[jorge0912]

It does wipe off and

I have had this happen on a few occasions with clear GE1. I’ve found no acceptable explanation for it. Good news is that it has not been problematic for me. I wouldn’t worry.

And wow thank u I’ll just won’t mind it then maybe my snails will eat it