Igrow2

After experimenting with this meter more and getting a millaukee pen and dirt test kit and pH drops it seems that this meter is actualy pretty accurate.

It only does soil (will not measure liquid)

The soil must be moist

I use nuetral water and a piece of paper to clean and burnish the probe before every use

Insert the probe then set it down and give it a minute to stabilize

I have checked it with my soil test kit tablets and pH drops and also against the runoff after watering with neutral distilled water with the pen meter.

This is a 14 dollar meter I got from a DIY store.

Any comments?

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-!g2


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Beener

Hi Igrow2...That's excellent that you found a probe meter that works. I had the Rapitest probe fail miserably for me. No matter what the pH was...It read about 7.

What I did that finally made me get rid of mine was (other than having grow problems) I took a sample of soil and doused it with nutes. I mean I soaked the sample in 4 times the strength nutes...and it still read about 7.

Then I took another soil sample and soaked it with pH up...pH still read about 7 No matter what I did to the sample...it read about 7 pH. Come to find out, that the actual pH in my pots was under 5.0! And by the time I realized it was the meter, I was flushing 5 gallon pots in the bath tub...it totally sucked.

Believe me, I wish the models I had worked. Because they're so easy to use. I mean...i doesn't get any easier than sticking a probe in your soil.

Good luck

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Beener

Moshe

Maybe the needle simply got stuck at 7? You know, like when the fuel gage is stuck in a car and you think you have a full tank and actually you're running on vapors.

Seriously though, for around $50, you can buy the real thing.

StonedForLife

I'v had one of them for ages, i thought i'd broke it but i tested it against my new digi and calibration fluid and its fairly accurate, sometimes it goes a little crazy and flys off the scale but i take the probe out of the soil and push it in again and its fine

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StonedForLife

My New Grow---Amnesia99, The church, White Rhino (work in progress)




Grow Light Operating Costs
How to Make Butane Honey Oil
pH and the delicate art of balance
UK doc grows pharmaceutical pot

"The drug is really quite a remarkably safe one for humans, although it
is really quite a dangerous one for mice and they should not use it."
J.W.D Henderson
Director of the Bureau of Human Drugs, Health and Welfare, Canada

StonedForLife

mine was the same, the little screw inside was too tight

__________________
StonedForLife

My New Grow---Amnesia99, The church, White Rhino (work in progress)




Grow Light Operating Costs
How to Make Butane Honey Oil
pH and the delicate art of balance
UK doc grows pharmaceutical pot

"The drug is really quite a remarkably safe one for humans, although it
is really quite a dangerous one for mice and they should not use it."
J.W.D Henderson
Director of the Bureau of Human Drugs, Health and Welfare, Canada

Igrow2

Yes, if you notice in my post I also have a millwaulkee pH pen meter which does liquids, I suppose I could spend another 50-75 on a good soil tester

but this rapitest meter seems to be fairly acurate and costs 14. I have not tested it on soil over 7pH yet but I have used aluminum sulphate to lower the soil pH to different degrees and it seems to work fine.

Maybe the RapiTest real problem is quality control.

__________________
-!g2


Grow Guide -questions answered here

The Not Just Another Bud Shot Photo Thread

My Art Photo Album

My 1st Grow White Widow, BigBud, BubbleGum