Silicon changing color

[Jonathan Troutt]

Hey guys currently leak testing a tank and all is going good but its got black silicone that is changing color. Anyone know what this is about.

 

[JustAnotherNanoTank]

Did you make this tank?

 

[JustAnotherNanoTank]

Or actually is this an old tank that’s been sitting?

 

[Jonathan Troutt]

Or actually is this an old tank that’s been sitting?

No its a tank that has been used. I purchased it it hasn't had water in it for prolly 3 weeks.

 

[JustAnotherNanoTank]

Does it wipe off like a slime or anything? Have you drained it to see if it changes? Are you just using tap water?

 

[Jonathan Troutt]

Does it wipe off like a slime or anything? Have you drained it to see if it changes? Are you just using tap water?

No it doesnt wipe off. In this picture i had just filled it up to make sure it did leak. So it was this color dry. And yes tap water for leak test

 

[JustAnotherNanoTank]

Well are you aware of the age of the tank? It’s almost seems like an age issue or improper silicone issue.

 

[Jonathan Troutt]

Well are you aware of the age of the tank? It’s almost seems like an age issue or improper silicone issue.

I believe its only a couple of years old. Its got 5/16” glass panels in it. I thought 75gals with trim were 1/4in. Certainly doesnt leak at all.

 

[Peace River]

Although I have never heard a definitive answer for the cause, this is not the first time I have heard about aquarium sealant turning yellow for not obvious reason (e.g., dosing, treatment, bleach, incorrect silicon, etc.). If you do a search on aquarium silicon discoloring or aquarium silicon yellowing then you will get a number of results describing similar situations. IMO, keep an eye on it but not necessarily a reason for panic. Good luck!

 

[Jonathan Troutt]

Although I have never heard a definitive answer for the cause, this is not the first time I have heard about aquarium sealant turning yellow for not obvious reason (e.g., dosing, treatment, bleach, incorrect silicon, etc.). If you do a search on aquarium silicon discoloring or aquarium silicon yellowing then you will get a number of results describing similar situations. IMO, keep an eye on it but not necessarily a reason for panic. Good luck!

Right on man i appreciate the time taken to respond to share that bit. Ive resealed many o tank in my time but really wasn't wanting to do it on this tank.