Saw dust anyone???

Magnum Man

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by the weekend my big RO unit will go on line... & I'll be pumping out water change water... with unlimited percentage of change possible, and the possibility, of either just a water change, or gravel vacuum with a change of the suction ends...

in my African Tetra tank, I'm getting wood fibers from several of the fish chewing up a softer piece of drift wood in the tank, resulting in dark water... ( in this case it's one of the highly recommended woods, that was staining the water heavily, so I boiled the crab out of it, until it quit staining the water so much... the boiling resulted in softening the wood, and I now have several fish that chew on it ) this gave me the idea, if your goal was a black water tank, wouldn't saw dust of the right kind of wood, be much more efficient, and effective, than adding a few leaves???

just some of the things I'm thinking about, as I work up the percentage of water changes... I don't currently supplement my "water" with anything, for the plants or fish ( I do add Bacter AE, to supplement my bio film, for the fish that eat that ) but I may have to add some of my hard well water in a small percentage to add back minerals, & my plants currently aren't very needy, and the fish take care of them... but a much larger percentage of water change, with RO water, may require something added back, for the plants as well...

Ideally I'd like to find a balance, where I can reach an except able water change percentage, for the fish, but still not have to add poisons back, just to grow plants...
anyway, on the saw dust question... what woods??? Oak, for starters???
 
Interesting idea. I bet if you had the right trees, and the sawdust was 100% wood, you might be able to bag it in a filter, the way we used to peat filter.

I have some old zip bags with very fine holes for filtration. It's all softwood around here. so that would be no go. I guess you'd need sawdust from something that had branches that would add tannins if you used them.
 
I would be cautious about adding sawdust to a tank to condition the water. The amount of surface exposed wood that can leach chemicals into the water would be far larger than any leaf, alder catkin, or piece of wood, likely by a factor in the thousands. If you try this I would try first with chips, and with very small amounts, you might get some severe water chemistry changes otherwise.
 
I have a piece of Mopany wood that was 15 years under water and left to dry a good 10 years.

When I wanted to use it again in a new tank it was too big, so I cut it in two and used one part.

It browned the water under 3 days...

So if you want to buy Mopany wood and trow it in a wood chipper to recover and bag in an aquarium.

I agree that it should be used as a dangerous concentrate :cool:
 

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