Can I add JBL Manado (substrate) to an aquarium afterwards?
It is no problem to add JBL Manado subsequently to the aquarium. But then I would recommend rinsing JBL Manado very thoroughly several times in warm water beforehand. Without this, natural raw material fluctuations could briefly lead to a release of calcium into the water. However this effect is only short-term and can be prevented by a thorough rinse in warm water.