Define really bad


it varies from peace to peace, the darker stuff leeches more but not for long period of time.. I left some in a 5 gallon bowl and it turned to tea, but only because it was a very small water volume, I hadn't planted it up and I let it soak without changing the water while waiting for it to sink.
The two drilled onto slate went straight in, this has been up 3 weeks and no water change yet
View attachment 18048
I'm sure there's some tannin
in there, I'll know better after water change but it's not bad
Full disclosure I'm sure this is
not real mopani, it's not that iron-hard super heavy stuff. Real mopani you can't get a screw into


This is just gnarled up medium density wood, but very attractive and inexpensive