Removing Tannins
I have a blackwater Amazon setup but the wood sometimes leeches a bit too much tannins in the water so my water becomes very murky. The fish love it, it seems but the plants on the bottom don't get much light. Looking for a way to remove some tannins or coloring without removing nutrients. That is keep my water a moderate tea stain, not a pure blackwater haha
Hello pan...
I had issues with tannic acid leaching from driftwood too. I just changed out half the water in the tank every week until the water cleared and dosed my ferts as usual. It didn't take very long for the water to clear, so my plants weren't affected.
Actually, water changes replace nitrates, phosphates and sulfates along with removing the tannins. These are nutrients the plants need. If you're dosing an inexpensive fert and there are a lot of them available, then I don't think your plants will suffer and you won't lose much by dosing your ferts as usual. Simply remove half the old tank water weekly until the water clears.
As always, just a suggestion to consider or not.
B