How to recolor or cover up this putty?

[Coxey81]

I got this tank used and the guy put this putty over the return I assume so the flow and water level was right.

But it's a bit of an eye sore on an otherwise pretty tank. (Heaters will be in the sump soon).

I know paint is a bad idea, but is there black aquacaping putty or something else I could use? Purple coralline is starting to grow, will it eventually hide it anyway?

Thanks for any responses!

 

[MnFish1]

I got this tank used and the guy put this putty over the return I assume so the flow and water level was right.

But it's a bit of an eye sore on an otherwise pretty tank. (Heaters will be in the sump soon).

I know paint is a bad idea, but is there black aquacaping putty or something else I could use? Purple coralline is starting to grow, will it eventually hide it anyway?

Thanks for any responses!

1) can you scrape it off (why is it there?)
2) It will be covered by algae, etc - in a time. I'm sure you could also get some marine-safe black silicone to cover it somewhat.

 

[Coxey81]

1) can you scrape it off (why is it there?)
2) It will be covered by algae, etc - in a time. I'm sure you could also get some marine-safe black silicone to cover it somewhat.

 

[Coxey81]

Its a home made overflow and sump system. Pretty sure he put it on there to slow the flow to the sump to match the pump. Probably was a little too much before.

 

[TheDragonsReef]

Give it time itll turn dark grey and get covered in algae