volcanic rock

[mackeith]

hi, i would like to check whether if volcanic rock rises ph/gh/kh?
recently brought a box of dymax volcanic rocks and used it for scaping the tank. would like to switch to sulawesi shrimp in the future. would it be suitable?

[barmby]

Volcanic rock should result in acidic water. Do a google. It should be. Farmers tend to grow crops near to volcanic areas after eruption because the soils are super fertile.