So you wanna add some crystals to your aquarium, but you’re not sure if it’s safe for your fishy friends or plants. Luckily I have a quick guide for you!
Please note this information was gathered through my own research, do some of your own if you are still unsure. Also - if it so happens anything I’ve added is incorrect, please let me know!!
This list is based off of the chemical make up of certain stones/crystals, and not how sharp or rough they might be. Make sure to factor that in when considering adding them to a tank, as something like a betta could have its fins torn easily :(