Tannin-stained water? - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 7 Old 06-27-2009, 03:42 PM Thread Starter
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Tannin-stained water?

Just wondering what tannin stained water is, as we have just bought a Diamond Tetra, and apparently these like tannin stained. And I cant find anywhere what it is.
So thank you for any help in advance.
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post #2 of 7 Old 06-27-2009, 06:35 PM
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Tannin stain is "tea" colored water.
Often times driftwood is added to get this effect, thinking some types of leaves may be used as well.
None of my tanks are tannin stained, so someone else would be better on giving advice on how to keep tannin stained water.
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post #3 of 7 Old 06-27-2009, 07:14 PM
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Twistersmom is correct in defining tannin and how to get it. Most of us don't want it, as the water while clean is brownish/yellowish along the lines of weak tea. Water that is slightly acidic (pH below 7.0) is acidic because it contains organic nutrients that have leeched into it from vegetation and wood, i.e., tannins and other things.

Diamond tetras (Moenkhausia pittieri) come from Venezuela and inhabit waters that are soft (hardness) and acidic. These waters are frequently stained brown with tannins, which is why they are so acidic. They do tend to really 'sparkle" in such water, but they will look very nice in clear water that is slightly acidic and soft (particularly if they are wild caught fish; commercial bred fish are a bit more tolerant), but regardless, to look their best (and they are a very pretty tetra to be sure) they need a spacious tank (for swimming) with plants at the sides and back. They should be kept in a group as they are shoaling fish by nature, and will feel secure and be at their best in colour when kept in a group of 5 or more. The males have elongated dorsal fins so its easy to tell them apart from females except in very young fish when the dorsal hasn't developed yet. The males will continually display much like the Black phantom and several other tetra species, both to rival males and to the females.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #4 of 7 Old 06-27-2009, 08:22 PM
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I love my diamond tetras!!!!
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post #5 of 7 Old 06-27-2009, 09:31 PM
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Indian Almond Leaves are also frequently used.

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post #6 of 7 Old 06-30-2009, 03:39 AM
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oaks as well :)

wondering is the beauty of mystery
Check out my 29g grow out (quite a mixed bunch)
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post #7 of 7 Old 07-01-2009, 07:32 AM
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I have tannin stained water but the tea effect didn't last much past the first few weeks/water changes. It's still stained but only really noticeable when I change the water and its all sitting in a pure white bucket.

Tetra Fanatic
Watch my tank progress from Craigslist salvage to fishy habitat: Aaron's Tank
The only things that happen quickly in an aquarium are bad things.
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