having your sand path higher and sloping outwards towards the dark substrate will help. may not have the visual you want but lining the edge of the sand with small rocks of the same type you have in there will help but it then becomes to defined and looks more like a rock garden pathway. do you have any bottom dwellers like plecos or corydoras? oh just looked closer at the second pic and I see a pleco. he is probably a factor.
Last edited by Starwarsfan; 05-11-2019 at 12:30 AM.