DriftWood help please - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 19 Old 01-14-2009, 10:16 AM Thread Starter
Cool

i do strongly believe that water is hard. Whenever i change the water or whatever, if in water spills onto the stand or the side of the aquarium, i measure by how much residue is left after it evaporates.

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post #12 of 19 Old 01-23-2009, 02:01 AM
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If you don't want to buy a hardness test kit, have it tested at the LFS. If it's sufficiently hard, I wouldn't worry about the driftwood dropping it by any measurable amount.

Normally I'm all about getting aquarium related stuff from other sources (it's always cheaper that way) but driftwood is one exception. Malaysian driftwood (my favorite) and mopani root wood are already dense enough that they'll sink without being waterlogged. They also look really nice and will last a looooong time in your tank before starting to rot (I'm talking decades or more).

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post #13 of 19 Old 06-30-2009, 09:46 AM
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so the tannins of the driftwood are what affects the ph slightly? if my water is already have a high kh if I let the water sit for a period will the buffers dissipate out to where the driftwood wiil help lower the ph?
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post #14 of 19 Old 06-30-2009, 11:44 AM
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so the tannins of the driftwood are what affects the ph slightly? if my water is already have a high kh if I let the water sit for a period will the buffers dissipate out to where the driftwood wiil help lower the ph?
It will be very slight. Another member (can't remember who at the moment) in a different thread recently mentioned a lowering of .2 with a lot of wood in his aquarium. I have a lot of wood in my aquaria, and I have very soft water out of the tap (pH is 6.8) and my tanks run at 6.2 to 6.5 with the diurnal variation. I suspect it is the normal biological actions and nitrogen cycle in the tanks more than the wood, although the wood may add a bit.

I have about half a cup of dolomite gravel in a nylon bag in the top chamber of each filter to maintain a pH above 6 (without it the pH drops). The dolomite adds some GH (General hardness) and KH (carbonate hardness) to my water that is very soft, and it is the KH that is the buffering agent for pH. I personally don't know how long water in an aquarium will retain its inherent bufferent capacity, although I have read that continually adding acids will at some point cause the buffering capacity to be used up and at that point further acid would significantly drop the pH (to the fishes detriment), something to be avoided. I would suspect that the acid leeching from wood (through tannins) would not be sufficient to significantly alter your water's buffering capacity if it is hard to begin with. And the weekly partial water change would counter this effect before it became serious, in my view.

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 #15 of 19 Old 06-30-2009, 03:39 PM
I have 4 pieces of wood in mine, all around a foot long, one its practically just a block and at first it lowered my ph by around .4-.5 but now its only .2. Driftwood is only a viable PH lowering solution for very soft water or water that only needs to be lowered by a little.
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post #16 of 19 Old 07-01-2009, 07:11 AM
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Quote:
Originally Posted by iamntbatman View Post
If you don't want to buy a hardness test kit, have it tested at the LFS. If it's sufficiently hard, I wouldn't worry about the driftwood dropping it by any measurable amount.

Normally I'm all about getting aquarium related stuff from other sources (it's always cheaper that way) but driftwood is one exception. Malaysian driftwood (my favorite) and mopani root wood are already dense enough that they'll sink without being waterlogged. They also look really nice and will last a looooong time in your tank before starting to rot (I'm talking decades or more).
I have a piece of mopani in my betta tank and I fully agree, it's gorgeous and it sank immediately with no water logging.

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post #17 of 19 Old 07-01-2009, 02:13 PM
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I bought a piece of mopani driftwood from Dr. Foster and Smith about a month ago and have had it in my 10 gallon tank with no noticeable alteration of pH, but have had a slight yellowing (to be expected) of the water. It sank immediately and looks awesome. I would recommend it. I did soak mine for 48 hours and did a water change at 24 just to get some of the loose wood particles and some of the tannins out. My water is hard though, so from what everyone else is saying that's why I haven't observed any changes.
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post #18 of 19 Old 07-01-2009, 03:29 PM
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I also have a quick question concerning DW... would cottonwood be ok to use?

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post #19 of 19 Old 07-02-2009, 07:11 AM
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From what I know of it I don't think so. It's soft, fibrous, and rots quickly. Pretty much a strikeout. I have no direct experience with it though.

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