Alastair said:a window removed? bet that wasnt cheap ha ha.
ive read that on another forum somewhere about the limpopo changing colour, cant remeber where i saw it now. Are you sticking with the sand then?
Yes i think so because the plants have been growing in for a month or so and it would not be an easy process to remove it. However i want to cap it to darken the substrate and the only thing I can find is dennerle quartz sand that comes close. I think there is somthing strange with the latest batch of Limpopo sand, it doesnt seem to be inert as it should probably be and on its own raises the water hardness.