Should I worry about this silicone?

[DHill6]

I’m not sure if this is discoloration or a problem. Really dark towards bottom of silicone.

 

[CasperOe]

Any other signs of issues with your silicone around the tank?

What tank do you have?

 

[DHill6]

No, just this area. Red Sea reefer 170

 

[miller75]

I’m not sure if this is discoloration or a problem. Really dark towards bottom of silicone.

I dont think thats discoloration, I think its the coralline above that's making it look darker my tank does the same.
Try scaping it off and see what it looks like

Edit: If you look at the picture its even the same shape as the coralline

 

[CasperOe]

I think @miller75 might be right about this! Well spotted..

Red Sea don't have a great track record with larger tanks. I wouldn't be too worried about this though!

 

[DHill6]

corraline is covering the silicone, it’s really stuck on there. Only time it’s been clean when I rip cleaned the tank and used a lot of peroxide.

 

[miller75]

corraline is covering the silicone, it’s really stuck on there. Only time it’s been clean when I rip cleaned the tank and used a lot of peroxide.

If your really worried scrape the top half of the coralline and see if the darker part changes shape, I think your fine though

 

[DHill6]

Thanks for the replies. I’ll give that a go.

 

[DHill6]

I dont think thats discoloration, I think its the coralline above that's making it look darker my tank does the same.
Try scaping it off and see what it looks like

Edit: If you look at the picture its even the same shape as the coralline

You’re right, it was the coralline casting a shadow.