One of my tanks has had its gravel for about 4 years and it's really mucky. This weekend I intend to get it out, rescape and give the gravel a good wash through. Now I wont have enough tank water to wash it with and leave enough in the tank for the fish. Can anyone see any problem with washing it with treated water.
I really don't want to replace it as it would cost a fortune and I would lose all the good bacteria.
I really don't want to replace it as it would cost a fortune and I would lose all the good bacteria.