General Hydroponics GH1541 PH 4.01 Calibration Solution for Gardening, 8-Ounc, 8 Ounce, natural

The pH meter is a cool piece of equipment. They make testing your solution a breeze and save you a lot of time. The only problem is that they are relatively expensive in the long run, and they are prone to drifting readings as well as general failure, regardless of how well they are maintained and calibrated. It's gotten to the point where the only real problems I have with pH and, as a result, my plants, are when a pH meter decides to lie to me and I notice the deficiencies as a result. Tired of wasting money on games and then having to double-check the meter's results with drops? So I just use these drops and I haven't had any problems since.

Tristen Hunter

| Mar 10, 2021

I recently ran out of one batch and had to start over. I tested the same three fluids (hydroponic nutrient solution) and found that two batches of General Hydroponics GH1516 produced different results. The tests were only a few minutes apart and took place in the same location. The three fluids are displayed in three columns in the image, with the "old batch" of GH1516 on the top row and the "new batch" of GH1516 on the bottom row. br>br>The old batch is reading around 0. in the left and middle samples. The new batch has a pH of 5, which is 5 points higher than the old batch. It's more difficult to find the right sample. The test with the new batch (bottom row) was performed after adding enough pH Up to the reservoir under test (based on previous titrations) to raise the pH by about 0. It should've been yellow(er) and worth 5 units. br>br>Clearly, the previous batch had a reading of around 0. The new batch has a pH of 5, but which is correct (if either). For a few days, I borrowed a calibrated laboratory pH meter and put the new batch to the test. The new batch appears to be reading correctly, indicating that my nutrient solution was at least 0. for the months I was using the old batch. I didn't want it to be 5 times as acidic as it was. br>br>As a result, I can't rely on the solution reading the same in every batch, which makes me nervous. Fortunately, I'll be able to test each batch with a good pH meter, so I'll keep using this product for now. However, it would be great if someone could explain what's going on and how people who don't have access to expensive test equipment can be confident that the pH readings are correct.

Lennox ROBSON

| Jan 07, 2021

The pH difference between 6 and 7 is difficult to see. This is what I bought to keep my water at a consistent temperature of around 6. 4 pH. My well water is just under 5, which means it's acidic, but the problem with these drops is that the color difference between 6 and 7 is too great. 0 and 6. 5 and 7. The number 0 is extremely difficult to decipher. Below 6, the color shifts to a reddish hue, but above 6, the various shades of green are visible. 0 to 7. Whether it's 0 or 7, I'm having trouble distinguishing between 5 and 6.

Lionel Parrish

| Jun 28, 2021

This is a fantastic product. It never needs to be re-adjusted, unlike electronic probes. It works every time, never needs calibration, and never expires. br>However, Amazon's delivery service disappointed me. It was stuffed into a box that was far too big and lacked padding. It had been tossed around enough that the top had come loose and dye had spilled into the box. I had hoped for a bit more from Amazon.

Royalty Richardson

| Dec 14, 2021

While it lacks the precision of a good pH meter, it's close enough to keep your ladies happy. This 8-ounce bottle of wine is a must-have for any wine conno The bottle is significantly cheaper than the 1 oz. On Amazon, you can find pH testing kits. Since 8 oz. , there has been a significant increase in the number of people is sufficient to last a long time, and I make sure to use 5 drops with each test I perform.

Megan Kaufman

| Dec 06, 2021

I've tested it with a pen a few times and it's always close or right on; by close, I mean the color is difficult to read from a distance of 6. 0 to 6. 5 is the sweet spot I'm looking for; I like it because I don't have to keep calibrating a pen; it's great for a quick test to see where you're at; there's a picture on the internet with the different colors in the vial that really helps; and I hold the vial against a white sheet of paper; I've already purchased it again; and I definitely would recommend it.

Corey Huff

| Jan 11, 2021

Simply a larger version of the smaller bottles included with the testing kit or ph up/down kit. It equals eight of the smaller dropper-style bottles. There isn't a dropper on this larger 8oz version. It's essentially a supply of refills. br>br> If you're storing it, make sure it's in a dark, cool place. Also, buy a plastic eye dropper or pipette and simply squirt the solution into your smaller bottle(s). Attempting to pour it is not a good idea. It'll splatter and dribble. Heh, you've been warned.

Hugh HUSSAIN

| May 13, 2021

I also have a digital ph meter, which is why I'm getting this again (the button batteries just died). Always keep in mind that tap or bottled water appears to be too acidic (usually around 6. ). 0ph- The ph scale ranges from 0 to 8, with 0 being the most acidic. So 7 and 6 are both neutral. Because our blood ph is around 7, 5 ph is too acidic for my drinking water. 35- Because my water has a pH of 45, I always alkalize it, and this is a precise product to use. When I run out, I'm likely to buy again.

Barbara Prince

| Jan 07, 2021