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Ships within 48 hours · Estimated delivery Jun 14 - Jun 19
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Description
yieryi New TDS PH Meter PH/TDS/EC/Temperature Meter Digital Water Quality Monitor Tester for Pools, Drinking Water, AquariumsMeasuring range: pH: 0. 00 14. 00pH; TDS: 0 19990ppm; EC: 0 19990muS cm Resolution: 0. 01 pH; 1ppm; 1muS cm; 0. 1; 0. 1degF Accuracy: pH: + 0. 01 pH; TDS EC: + 2%; Temp: 0. 5 Batteries: 3 * 1. 5V LR44 button cell (not included) Temp.: 0. 1 60. 0; 32. 0 140. 0degF Calibration: pH: three points automatic calibration (6. 86 & 4. 00 & 9. 18pH); TDS: 1413muS cm; EC: 1413muS cm Auto shut off: 5 Minutes 4 in 1 TDS PH EC Temperature Meter without Backlight 3
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- Free Standard Shipping on $100+ Orders to the USA.
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.9 ★★★★★
Based on 709 reviews
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Product Reviews
★★★★★ 4
If you have ADHD You need this
Size: 2 Fl Oz (Pack of 1), Size: 2 Fl Oz (Pack of 1)
This stuff works really good. If you are having a problem with ADHD and cannot get medication for whatever reason get this stuff.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026
★★★★★ 3
It was ok
Size: 2 Fl Oz (Pack of 1)
It tastes better than all the alternatives I’ve tried, but it makes me wonder if it is more sugar and less potency because I didn’t feel a noticeable difference after taking it like I had with some other brands. It also is a much fainter blue than the others I’ve taken…like it is possibly less concentrated(?) Anyhow, I could tolerate the flavor right out of the dropper unlike any others I’ve tried, but I’ll probably try a new brand next time as this wasn’t my favorite.
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Reviewed in the United States on August 14, 2025
★★★★★ 5
Great so far
Size: 2 Fl Oz (Pack of 1)
I started using this product about a week ago. I take it first thing in the morning on an empty stomach. So far and in the short amount of time I can tell that I'm having more constant energy that I had in awhile. Still to early to speak about other changes but I'm sure I will see more as the time goes. Definetly worth the buy.
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Reviewed in the United States on July 26, 2025
★★★★★ 5
Wow!
Size: 2 Fl Oz (Pack of 1), Size: 2 Fl Oz (Pack of 1)
I only started with a half dose and I can definitely feel the mental clarity. I feel hyper focused. My energy level did not necessarily change yet, but my focus definitely did. As I work my way up to a full dose I’m sure the energy levels will change. I went straight water with it and did not notice any kind of taste. The dropper is marked with dosage so the ease-of-use is great.
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Reviewed in the United States on July 9, 2025
★★★★★ 2
Leaky packaging
Size: 2 Fl Oz (Pack of 1)
Bottle leaked everywhere in package, smelled like cleaning solution.
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Reviewed in the United States on December 17, 2025
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