JBL Mandao Dark is a dark natural substrate with a grain size of 1.5 - 2.5 mm for all frehs water aqauriuums. Its porous structure promotes the growth of roots. Suitable for digging fish. JBL Manado Dark has a nutrient buffer with high iron content.
- Dimitrios L. wrote about JBL Manado Dark in March 2021:
Quality packaging the bags are very strong. The gravel is quite clean, it needs a rinse, but you can lay it immediately if you want. It's not that sharp, it hasn't got edges, nice feeling to the hand, so it might be good for bottom feeders (I don't have any). The color isn't black, its more of a very dark brown. I liked a lot, very satisfying!