Three years ago when I started indoor growing seriously I used pH solution and the old faithful color chart. Well… Since then I used mid grade pH pens. My pens are older now and I don’t think very reliable anymore. I have to fall back on the solution and chart till I can afford another pen. Are there any tips or tricks you use when reading these pH charts ??
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The best advice anyone here can give you is to buy a new meter. Nothing will ruin a grow faster than not checking your pH with an accurate meter. Those ph charts are good in an emergency only IMO. I wouldn’t risk my grow when I can get a $14 meter
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@bob31 I have a yellow ph meter like the one you posted. I am wondering how often do you think I need to calibrate it? It came with two calibration compounds- a 6.8 and a different one, but I don’t know why they send both high and low ph setting compounds. I will order some calibration powder to have on hand, but need to know how often you think these low cost devices need to be done?
I bought the cheapest digital reader and it’s still working. Just make sure it’s calibrated once a week.
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will they get that much in a week I check mine once a month.
I check mine every couple of weeks or so. Mine is almost a year old and it’s only off by .1 at the most. My tap water is consistent at 7.2 so if I check it at anything other than that I test it with 7.0 calibration fluid.
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I purchased the GH 7.0 standard reference solution and I use it every time I water. It’s just too important to futz around and quibble over a few pennies after all of the time and effort you put in.
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I just ordered another pH pen. Yes… It’s a " got to have " item in the grow room. Thanks.
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Get the reference solution too, and follow the storage instructions for the electrode. Don’t trust the readings until you KNOW.
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AMEN!!! (Adding extra characters bc I have to!)
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