How to fix water damage to wood floor

[Noel Ong]

Hi! I am newbie and wants to ask how to fix a hardwood floor. Attached is a picture of the damage This damage was under a rug for quite some time. The previous owner covered it, they say that it was a damage by water dripping out of a plant pot. Any idea on how to fix this? Do you just sand it and maybe varnish it. Sorry I really have no experience doing this, so any help will be great. Thanks.

 

[Nick]

Do you have any extra boards ?

 

[Noel Ong]

Unfortunately No. This wood looks like hardwood. Cant hardwood be fixed?

 

[Floorist]

Probably have to sand and refinish the whole floor, or just throw the rug back over it.

 

[Nick]

Can't tell by the photo if you see black on the wood .. Water sinks in deep .. You can try sanding , But i assume you don't know what finish was put down so i would sand the complete floor , and pull one base coat , and two top coats .. PS: It is hardwood ..