awilson133
Aquarium Advice FINatic
- Joined
- Jan 24, 2012
- Messages
- 665
tannis is in driftwood. its not harmful to fish. most fish like, it!! anyways when driftwood isnt soaked or prepped properly it can make a tan or tea color to your tank water. which is called tannis. usually soaking the wood for a week or 2 will get most of it out. boiling it can make it go faster.