gautier
Aquarium Advice Apprentice
Hi,
I have an indicator for GH by Hagen. But i don't have any instructions on how to use it. I think it's used for freshwater tanks as my friend gave me this since he owns a saltwater tank.
anyone have an idea how to use this?
I have an indicator for GH by Hagen. But i don't have any instructions on how to use it. I think it's used for freshwater tanks as my friend gave me this since he owns a saltwater tank.
anyone have an idea how to use this?