Other Sellers on Amazon
+ Free Shipping
+ Free Shipping
+ Free Shipping
General Hydroponics PH 4.01 Calibration Solution for Gardening, 8-Ounce
Get free shipping
Free 5-8 business-day shipping within the U.S. when you order $25 of eligible items sold or fulfilled by Amazon.
Or get 4-5 business-day shipping on this item for $5.99. (Prices may vary for AK and HI.)Learn more about free shipping
|You Save:||$1.55 (17%)|
- Make sure this fits by entering your model number.
- General Hydroponics uses the highest quality electronic meter reference solutions
- Growers can use our reference solutions widely among many popular brands of meters using the NaCl scale
- General Hydroponics technicians check each batch to ensure that our solutions are exactly calibrated each time they are used
Frequently bought together
Customers who bought this item also bought
What other items do customers buy after viewing this item?
Have a question?
Find answers in product info, Q&As, reviews
Please make sure that you are posting in the form of a question.
Compare with similar items
General Hydroponics Ph 4.01 & Ph 7.0 Calibration Solution Kit, 8 oz
General Hydroponics pH Down Liquid Fertilizer, 1-Quart
General Hydroponics 1500 PPM Calibration Solution for Gardening, 8-Ounce
General Hydroponics pH Up Liquid Fertilizer, 1-Quart
General Hydroponics CALiMAGic Quart
|Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping||FREE Shipping|
|Sold By||Amazon.com||Xtreme Hydro||Amazon.com||Amazon.com||Amazon.com||Amazon.com|
|Item Dimensions||1.3 x 6 x 1.8 in||8 x 4 x 4 in||3.2 x 3.3 x 9 in||1.2 x 6.1 x 1.9 in||3.2 x 3.3 x 9 in||3.3 x 8.6 x 3.2 in|
General Hydroponics uses the highest quality electronic meter reference solutions. Growers can use our reference solutions widely among many popular brands of meters using the NaCl scale. General Hydroponics technicians check each batch to ensure that our solutions are exactly calibrated each time they are used.
Top customer reviews
There was a problem filtering reviews right now. Please try again later.
It's basically a refill supply. Make sure to keep it in the dark cooler places for storage. Also, when filing your smaller bottle(s), buy a plastic eye dropper or pipette, and just squirt the solution in.. do NOT try to pour it... it will dribble and spill. You were fore warned heh.
There is plenty of liquid even if you try it with 5 drops vs 3 drops. I'm obsessed and I was able to verify some of the claims by my drinking water products! By the way, Penta water (one of the most expensive brands that I bought boxes of!) followed by Voss (fancy bottles) tested the lowest with the lowest pH levels 5.5-6.5! Tap water in my town has a pH level of 8 or above!!! Go figure!
Great Price/Great Product/Fast Shipping. Will be back to get some more and not looking elsewhere!
Not like the cheaper PH strips that are harder to read both colors which dont match.
Have both and the PH strips are more convenient but matching the colors to their color match is difficult in many cases.
Stick with this if you want a more accurate reading