They do have a coating
Are These Rocks Safe To Put In A Fish Tank?
•••Fancy Fishes••• (Left) 03/18/19
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From •••Fancy Fishes••• (Left)
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I have the same ones and I've used them. They work fine!
Ok thanks!!
Reply to: LunarKennedy
You're welcome!
Just sterilize them they should be fine
Ok