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⚡ Master your grow with precision pH power!
Atlas Scientific’s pH Up and Down 250ml set delivers precise, ready-to-use liquid solutions designed to optimize pH levels in hydroponic and aquaponic systems. With easy dosing instructions and no dilution needed, it ensures rapid, stable pH adjustments to maximize plant health and yield.




| ASIN | B00P1MQWK4 |
| Best Sellers Rank | #45,494 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in Chemical Standards |
| Brand | Atlas Scientific Environmental Robotics |
| Brand Name | Atlas Scientific Environmental Robotics |
| Customer Reviews | 4.5 out of 5 stars 4,409 Reviews |
| Item Form | Liquid |
| Item Weight | 0.5 Pounds |
| Liquid Volume | 250 Milliliters |
| Manufacturer | Atlas Scientific |
| Manufacturer Part Number | CHEM-pH-UD-8 |
| Model Number | CHEM-pH-UD-8 |
| Number of Packs | 2 |
| Target Species | Fish and Plants |
| UPC | 857434005305 |
| Unit Count | 16 Ounce |
T**T
Helped Cure My Hydroponic PH Blues
The village we live in has well water from a Lake Superior aquifer and the TDS and PH is not great. I was running at around 7.5-7.8 PH in my hydroponic system where I am growing, spinach, swiss chard and a number of lettuces. Optimal PH is 6-7. I have a 10 liter #4 drip system and the instructions said to add 3ML of the solution per litre but also cautioned that a little goes a long way. I halved the recommended mix and added 15ML of PH Down to 10L of water. Within 30 seconds my PH was at a stable 6.5. Super happy, great product, highly recommend!
S**N
Does what it says
Easy use good product does what it says
P**9
I was skeptical…
After reading the reviews I was skeptical but when it arrived and I treated the water that started with a ph of 9.3 and put a few drops in it dropped to 4.13. It worked great!!! Seals were good when opening looked brand new and worked as it should!
A**X
works just make sure got a good reader
i got this for my grow and i screwd up my plant, but had one of those cheap meter readers for the ph
A**R
as described!
As advertised, shipped quick, TY!
A**W
A little goes a long way!
I’ll start by saying I’m using this on water that’s already been through a 4 stage reverse osmosis system. That being said I’m already pretty close to the desired parameters. I’m making my water in gallon jugs and using a small syringe to add the solution. I needed to lower my PH just one full number and all it took was less than 3 ml of solution to do it. This should last quite a long time if it continues to be this efficient. So far I’m pretty happy with it. The bottles are pretty small but as little as it takes to adjust your levels it doesn’t really matter.
K**A
Bent bottles and broken seal
Seal was received broken and bottles bent
S**N
Fantastic!
Atlas Scientific pH Up and Down 250ml (8oz) works great. a very good value for the money. I highly recommend.
Trustpilot
2 weeks ago
1 day ago