![Need help: what is this on the surface? Looks like oil. New tank 8 weeks, JBL Sansibar Dark, just a few plants and seiyru stones (from another of my tanks) never saw Need help: what is this on the surface? Looks like oil. New tank 8 weeks, JBL Sansibar Dark, just a few plants and seiyru stones (from another of my tanks) never saw](https://preview.redd.it/59p7tq1ohr381.jpg?auto=webp&s=2647a1af9616ca455ae77c476cebfb61b8efb9c0)
Need help: what is this on the surface? Looks like oil. New tank 8 weeks, JBL Sansibar Dark, just a few plants and seiyru stones (from another of my tanks) never saw
![Has Anyone (experience With) Jbl Sansibar Dark? | Freshwater Substrates - Gravel, Sand Forum | 349823 Has Anyone (experience With) Jbl Sansibar Dark? | Freshwater Substrates - Gravel, Sand Forum | 349823](https://www.fishlore.com/aquariumfishforum/data/attachments/392/392850-2364c199aa0716ecccf45af12c6b6dba.jpg)
Has Anyone (experience With) Jbl Sansibar Dark? | Freshwater Substrates - Gravel, Sand Forum | 349823
![Has Anyone (experience With) Jbl Sansibar Dark? | Freshwater Substrates - Gravel, Sand Forum | 349823 Has Anyone (experience With) Jbl Sansibar Dark? | Freshwater Substrates - Gravel, Sand Forum | 349823](https://www.fishlore.com/aquariumfishforum/data/attachments/392/392849-b5c7bfc0b9617a805cd548c877d50269.jpg)