35% water change weekly. This is a link (here) where you can see the bottom of lake tanganyika where the Multis inhabit.There are so many snail shells that they go as far as your eye can see in the water!
The multi tank - Lake Tanganyika Biotope
Just green rock algae
4 Neolamprologus Multifasciatus + many tiny assorted snails (which I don't really want them in there)
Thin quartz sand substrate of 0.3-0.5 mm diameter light coloured,small rocks average size as a human fist grey-blueish colour,escargo snail shells 3-4 cm diameter playing the role of "neothanuma" snail shells.