PPM Chatter

I ran a little PPM comparison. My tap water - we have high quality tap here in my town. 43 PPM consistent. I decided to test some bottled water aqua fina. My skepticism had me believing bottled water had no real difference. 4ppm.

Do you think if I were to start with a 4ppm base I could make up the difference at feeding?

And if I can or do - would that give me a bit more yield due to higher absorption PPM rate?

Or is the difference of 40 PPM really not that big of a deal?

In put please. Thank you in advance.

P.S

I drive the plants up to 1500 PPM in VEG (killed a few when I slight increased to 1800 and added bushwacker )..

and am currently flushing at 320 ppm with a drip of 43 ppm in back up.

HYDRO FLORAL MINI COOL CAB
2 90w LEDS (the kick ass)

Aqua Fina water is basically RO water in that it uses reverse osmosis to filter it clean. They may add minerals after the fact I'm not sure. The bottled water you're thinking about is likely "spring water" like Evian which is basically tap water if I'm not mistaken.

40 ppms tap water is excellent water quality. Not sure why you'd want to opt for more expensive water when the stuff that's coming out of your faucet is quite fine for growing.

40 PPM Tap water is fucking awesome. I use R/O water out here in the desert from the water and ice stores and that comes in at 50 PPM. ANd if you are using tap water you wont have to add Cal/mag R/O water filters out Cal/Mag

BeaverHuntr said:

40 PPM Tap water is fucking awesome. I use R/O water out here in the desert from the water and ice stores and that comes in at 50 PPM. ANd if you are using tap water you wont have to add Cal/mag R/O water filters out Cal/Mag

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Should it be assumed that his tap water has sufficient calcium and magnesium for mj's needs? 43 ppms for his tap water seems low enough where he *might* actually need cal/mag or a suitable substitute.

Most water reports are available in major cities that can give accurate measurements in ppm's so if you're unsure you can always check.

Encomium said:

Should it be assumed that his tap water has sufficient calcium and magnesium for mj's needs? 43 ppms for his tap water seems low enough where he *might* actually need cal/mag or a suitable substitute.

Most water reports are available in major cities that can give accurate measurements in ppm's so if you're unsure you can always check.

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Yup good info.. +rep

Cool to know. I have been adding Cal Mag as a base to my tap water which comes out of the tap at 30 ppm every time. Brews great beer so figured it would grow nice plants. I would hate to buy 30 gallons of bottled water every change.

Dont always need cal\mag with RO water that would depend on the nutes you use. I use RO water with AN and never add the stuff and suffer no problems yet with hesi nutes you do need cal/mag if your using RO.

BendBrewer said:

Cool to know. I have been adding Cal Mag as a base to my tap water which comes out of the tap at 30 ppm every time. Brews great beer so figured it would grow nice plants. I would hate to buy 30 gallons of bottled water every change.

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I'm tired of it. I take 5 gallon jugs to the water and ice store once a week ( 7 of them ) . I'm about to go to Home Depot and shell out 300 bones for a R/O system.

I use GH Flora series and was told that it lacks Mg so I bring the water up to 250ish with the cal mag before adding nutes. I'm all ears for any other suggested ways. First time around and all.

If your tap comes out at 43 ppm thee's no reason to run a side by side test. The difference is negligible.

BendBrewer said:

I use GH Flora series and was told that it lacks Mg so I bring the water up to 250ish with the cal mag before adding nutes. I'm all ears for any other suggested ways. First time around and all.

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Same here. Advanced Nutrients are awesome and are specifically designed for cannabis cultivation, they just cost a lot.

Yeah - but that need is fulfilled at feeding time. Clones can get going with straight quality tap.

300 ppm tap water where im located would love low numbers like 43

I have 340 ppm out of the faucet. I fill up buckets and let them sit open for a few days to evaporate the chlorine out, retest and is usually down to 320 in 2 days. This water has always worked perfectly for me. I pull the quarterly water test results and check for boron, cal, mag, fluoride, and other heavy metals/gases. But rest assured, if it is good enough for large scale agriculutal use (I live in the farmlands that produce a lot of food), and the other plants around my house, then it's good enough for my girls.