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Re: more tds matching/drip acclimation issues

It's way past my bedtime, so factor that into my answer. OK?

I use a rough rule of thumb that a 2:1 difference in tds is tolerated pretty
well in both directions for abrupt dunking. If at all possible, I get the
difference to less than that in going down in tds. I would dunk fish from
500 ppm into 300 ppm with little stress noticed, usually.

Puddle fish survive sudden rain deluges, so they must have *some* temporary,
quick, way to adjust their osmotic barriers.

This is an area that lacks good scientific studies, AFAIK, so if someone
knows of any we would like to hear about them.

Wright

Doug Karpa-Wilson wrote:
> 
> Hey,
> 
> I am moving some fish around to free up a tank for newcomers, and the
> previous occupants were sitting in around 700 ppm (!  Dolomite gravel, I
> think, no salt) and the tank they were in quarantine for is at around
> 250ppm.  I've added salt to the destination tank to bring it up to 320ppm,
> but that's still too big a gap.  I've been drip acclimating the occupants
> for a couple hours, bringin it down to 630 or so, but I don't really want
> to leave them drip acclimating for ever.  Should I take a break and let
> that sink in until tomorrow morning (I think this is what I'll do, since I
> doubt I'll get answers tonight) then do another round tomorrow morning?
> I've got them on  slower drips now, but I don't really want to leave it
> over night unattended.  Hmm.
> 
> How long do you drip acclimate per 100ppm difference, say?
> 
> TIA,as usual,
> 
> Doug
> 
> Doug Karpa-Wilson
> Department of Biology
> Indiana University
> Jordan Hall
> 1001 E. 3rd St.
> Bloomington, IN 47405
> 
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-- 
Wright Huntley, Fremont CA, USA, 510 494-8679  huntleyone at home dot com

                There are two rules for success in life:
             Rule 1: Don't tell people everything you know.

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