TOTAL DISSOLVED SOLIDS

jimbo · **Joined:** Tue Jan 13, 2009 12:27 pm **Posts:** 786

well just got me self tds meter playing about with it these are the readings i got from tap 323

from fridge thats got a water filter on 384

from the pond 348

last water change done on saterday

what the paper work says is the lower your tds reading the better the water is how low is low and how can you lower it

this mite seam silly to some of you but you have to learn some were

KoiAddict · **Posted:** Wed Mar 03, 2010 3:13 pm

Good luck mate !! your on that slippery slope to the white coat and small room :lol:

Something to think of before all this starts

Feeding raises TDS,
Chemicals raise TDS,
Fish waste raises TDS,
Iron, salt, and calcium raise GH, and hence also raise TDS,
High Nitrates raise TDS.

Good luck in bringing it down buddy

Gazza · **Joined:** Fri Oct 10, 2008 7:47 pm **Posts:** 2162

Hi Jimbo,

The majority of fish from Japan are raised in soft water and some are very soft on a recent trip i think Mike measured some mud ponds and they where down very low under 50 :shock:

Its not just the lowering its keeping on top of things as to start getting much lower an RO unit would be required and then as you are stripping all the minerals out from the water you have to be careful when you get lower as there is a chance that the KH will drop off and cause a PH crash if not monitored.

MIO · **Joined:** Thu Jun 11, 2009 8:53 am **Posts:** 842

Hi Jimbo

Do you know what Supply and Pond GH/KH Values are Please :?:

jimbo · **Joined:** Tue Jan 13, 2009 12:27 pm **Posts:** 786

MIO wrote:

Hi Jimbo

Do you know what Supply and Pond GH/KH Values are Please :?:

never checked g/h and kh supply is thames water

pondy · **Joined:** Sun Sep 28, 2008 9:22 pm **Posts:** 3518

Mio, he dont live too far from me, so they will be fairly high and hard

Gazza · **Joined:** Fri Oct 10, 2008 7:47 pm **Posts:** 2162

Did you calibrate the unit jimbo out of interest :?:

Sorry i forgot to ask last time but meant to ................................before you say it yes i am getting old :roll:

MIO · **Joined:** Thu Jun 11, 2009 8:53 am **Posts:** 842

pondy wrote:

Mio, he dont live too far from me, so they will be fairly high and hard

That`s what I concluded ..

The Values do sound suprisingly low for that Area ..

What Meter is it Jimbo ? and is it reading in PPM :?:

jimbo · **Joined:** Tue Jan 13, 2009 12:27 pm **Posts:** 786

the meter was factory calibrated to a naci 342 ppm solution

www.hmdigital.com this is the make of the meter

Davej · **Joined:** Wed Oct 08, 2008 10:03 pm **Posts:** 1487

Hi Jimbo

Unless you go down the RO route your pond TDS is gonna be very much dependant on your supply.

Doesn't really matter it the calibration is spot on, you simply need to see what the difference betwen supply and pond is; Lack of water changes, too much c**p building up etc and the difference will increase.

- and if you ever add salt to the pond things will be screwed up TDS wise for eternity.

Just out of curiosity, was the water from the fridge cold? warm it up to 20C and see if that gives a different reading..

Dave

TOTAL DISSOLVED SOLIDS

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