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Discuss water requirements, "soil" (growing media) and suitable planting containers

Moderator: Matt

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By MikeB
Posts:  1607
Joined:  Sat Apr 25, 2020 4:13 pm
Clayton, North Carolina, USA (20 miles southeast of Raleigh)

Tap water: 150 PPM (pulled from the Neuse River, has a lower PPM after a heavy rain)

Rainwater collected from an asphalt-shingled roof: 8 PPM

The roof is my main source of water. I have two 80-gallon rain barrels plus 60 one-gallon jugs.
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By ChefDean
Posts:  8306
Joined:  Tue Sep 18, 2018 12:44 am
I just got my TDS meter and had to try a bunch of different waters. Here we go.

Location: Clarksville Tennessee
Tap, right after opening the faucet: 112 PPM. Not optimal, but I could use it in an emergency.
Tap, hot, after allowed to run to bring hot water to the faucet: 150 PPM. Not going to use that.
Tap, cold, allowed to run to flush the pipes: 101 PPM. I can use that if necessary.
Filtered from the fridge: 96 PPM. Better, TDS going down.
Tap, run through a Brita filter pitcher: 46 PPM. Now we're getting somewhere.
However, filtered fridge run through the Brita filter: 76 PPM. Interesting.
Rain water, collected in a bowl, 10 feet away from the house: 7 PPM. Yup, still going to use that.
Lastly, distilled: 0 PPM. Of course it is.
The initial Brita water had been sitting in the fridge a couple of days, maybe the temperature, 37°F, or time being allowed to "settle" had an effect.
I'm going to have to try some other combinations of water to see if I can reliably bring it down to make sure it's safe to use.
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By hungry carnivores
Bay Area, CA.

Tap - Prefiltered 22ppm, With carbon filter 12ppm.
Fridge - ~5ppm (This goes through carbon filter)
Brita - 3-4 ppm

In the winter, these numbers jump to 50 or so which is still doable but it rains enough to collect rain during this period.
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By Panman
Posts:  5659
Joined:  Wed Mar 04, 2020 8:41 pm
South Atlanta, GA

Tap - 72ppm from a well
Dehumidifier - 0ppm

I have been using tap water at 72ppm for all of my plants for years without problem. That being said, They are all outdoors and are regularly flushed with rainwater so that may be to my advantage. I've recently started using water from the dehumidifier and it has been working well.
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By Intheswamp
Posts:  2367
Joined:  Wed May 04, 2022 2:28 pm
Crenshaw County, south central Alabama
Personally tested TDS, Quint-Mar Water Authority tap water- 325ppm
Official annual report 2021(Quint-Mar) tap water - 143-455ppm (multiple wells)
Rainwater (metal roof) - 0-2ppm range.

The county sits above a large limestone aquifer.
By Jeanette56
Posts:  17
Joined:  Wed Jan 19, 2022 2:44 pm
Uvalde County, Texas
Spring fed well water - 249 ppm
New, 5 stage ZERO water pitcher - 0 ppm

It will be interesting to see how often we have to change filters on the ZERO unit but it will sure cut down on buying plastic jugs of water for the coffee maker, the Keurig, and the CPs. Our water tastes good but the hard water buildup on our appliances is tough on them. We go through a lot of vinegar!
By Gary
Posts:  326
Joined:  Fri Jul 08, 2022 3:23 pm
Prescott, AZ tap water - 125 to 140 ppm. Not too bad.
We get our water from a local reservoir. I got a Zero Water system, it gives 0 ppm water. I get about 30 gallons from each filter. When the water gets up to 6-7 ppm it starts smelling "fishy". Since we use it for drinking as well, I have to change it even though the plants wouldn't mind the odor. Considering getting a second unit just for the plants so I can use the filter until it completely blinds up.
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By Intheswamp
Posts:  2367
Joined:  Wed May 04, 2022 2:28 pm
davinstewart wrote: Sat Jan 21, 2023 7:21 pm Quick reminder for everyone to please document the temperature of the water as well since TDS meters are very sensitive to temperature.
Thought I'd insert a link to a post I just made regarding temperature while testing...
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