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Old 01-07-2014, 09:11 PM
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What TDS is safe for repotting?

G'day. I have some LFS I've rinsed in RO water. TDS is 80 (less than our tap water). I reckon it's "safe" to use now (it started out at 240).
Does anyone know to what TDS I should rinse? I have some turface I'm rinsing down as well, dunno how low I can get it...
Thanks in advance!
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Old 08-11-2014, 12:26 PM
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Total dissolved solids will cause water to become more basic over time. Plants like acidic 5.5 to 7.5. Plants can not absorb micro elements when the PH is too basic. Regardless of your TDS they will build up.

That said my water is 1700 that's 17 hundred parts per million.

It retards the growth a little in the winter when I water, but since my nursery is outside in Florida our summer rains flush everything out. Flushing is necessary for good orchid care. Put your plants outside in a heavy rain occasionally if you can.
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Old 08-11-2014, 01:28 PM
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Hi GH

What is LFS?

TDS = 80 ppm sounds pretty safe, assuming that is the quality of water from rinsing this potting material.
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Old 08-12-2014, 06:38 AM
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LFS = long fiber sphagnum.

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Old 08-12-2014, 06:25 PM
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OK thanks Brooke, guess I have never seen the abbreviation before!
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Old 08-18-2014, 06:12 PM
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G'day and thanks for the replies. I missed the earlier notifications and have been focused on carnivorous plants.
CPs are extremely sensitive to nutrients in both the soil and water so I tend to rinse all my potting materials down to 50ppm or lower. My apartment is dry, even in summer so I tend to use LFS as a base for both orchids and CPs.
Thanks again and happy growing!
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