Chris wrote in message ...
Been all afternoon with bogwood in pans of boiling water to try and
remove brown colour. Anything you can use to seal the bogwwod. Like
clear varnish but not effect the water when in the tank.
Thanks,
Chris.

I'd just put up with it, do regular weekly large water changes, 50%+.
That's soaking and is good for the tank(allows you to dose and remove
any waste build up).
Typically the color does not bug you till day 5-6 or so depending on
the nature and amount of wood you have, as mentioned, some carbon can
tide you through.

Regards,
Tom Barr