--- product_id: 13731106 title: "Atlas Scientific pH Up and Down 250ml (8oz)" brand: "atlas scientific environmental robotics" price: "€ 67.42" currency: EUR in_stock: true reviews_count: 8 url: https://www.desertcart.hr/products/13731106-atlas-scientific-ph-up-and-down-250ml-8oz store_origin: HR region: Croatia --- # Optimized for aquaponics & hydroponics 250ml precision volume Use 15ml per gallon dosing Atlas Scientific pH Up and Down 250ml (8oz) **Brand:** atlas scientific environmental robotics **Price:** € 67.42 **Availability:** ✅ In Stock ## Summary > 🌿 Master your grow game with precision pH control! ## Quick Answers - **What is this?** Atlas Scientific pH Up and Down 250ml (8oz) by atlas scientific environmental robotics - **How much does it cost?** € 67.42 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/13731106-atlas-scientific-ph-up-and-down-250ml-8oz) ## Best For - atlas scientific environmental robotics enthusiasts ## Why This Product - Trusted atlas scientific environmental robotics brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Consistent Dosing:** Use 15ml per gallon or 3ml per liter for reliable, repeatable results - • **Dual 250ml Bottles:** Perfectly portioned pH Up and Down solutions for precise control - • **Optimized for Growth:** Specifically designed to balance pH in aquaponics and hydroponics systems - • **Ready-to-Use Formula:** No dilution needed—just measure and adjust with confidence - • **Trusted Brand & Ratings:** Atlas Scientific, #5 in Chemical Standards with 4.5-star rating from 4,400+ users ## Overview Atlas Scientific pH Up and Down 250ml set offers expertly calibrated liquid solutions to precisely adjust pH levels in aquaponics and hydroponics systems. Each 250ml bottle is ready to use without dilution, ensuring consistent dosing of 15ml per gallon or 3ml per liter. Trusted by thousands, this kit delivers reliable, professional-grade pH management for optimal plant and fish health. ## Description ["https://m.media-desertcart.com/images/S/aplus-media/sc/cf6b7c43-e048-4f67-86c8-780d095fc3a3.__CR0,0,970,600_PT0_SX970_V1___.jpg", "https://m.media-desertcart.com/images/S/aplus-media/sc/542d9037-f5bc-4f40-8d18-b1b2abf83003.__CR0,0,970,600_PT0_SX970_V1___.jpg", "https://m.media-desertcart.com/images/S/aplus-media/sc/8785e651-016c-485d-b829-a1320f55bc67.__CR0,0,970,600_PT0_SX970_V1___.jpg", "https://m.media-desertcart.com/images/S/aplus-media/sc/450a8213-2206-4f51-93c1-d46671bbb247.__CR0,0,970,600_PT0_SX970_V1___.jpg"] ## Features - Great for Aquaponics and Hydroponics - One 250ml (8oz) pH Up and One 250ml (8oz) pH Down - Use 15mL (1 tbsp) per Gallon or 3ml per Liter - This hydroponic solution does not need to be diluted. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B00P1MQWK4 | | Best Sellers Rank | #43,771 in Industrial & Scientific (See Top 100 in Industrial & Scientific) #5 in Chemical Standards | | Brand Name | Atlas Scientific Environmental Robotics | | Customer Reviews | 4.5 4.5 out of 5 stars (4,412) 4.5 out of 5 stars | | 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 | | Target Species | Fish and Plants | | Unit Count | 16 Ounce | | Upc | 857434005305 | ## Product Details - **Brand:** Atlas Scientific Environmental Robotics - **Item Form:** Liquid - **Item Volume:** 250 Milliliters - **Item Weight:** 0.5 Pounds - **Package Information:** Bottle ## Images ![Atlas Scientific pH Up and Down 250ml (8oz) - Image 1](https://m.media-amazon.com/images/I/61LfnP-0byL.jpg) ## Questions & Answers **Q: Estos productos son para piscina?** A: No! **Q: So how do you know what the PH is in the soil n plant** A: You have to do a slurry test.. mix equal parts (2 ounces) of soil with ph neutral water(7ph) .. mix for about a minute, let sit for 5 minutes, then put ph meter in slurry mix. Your reading is your ph in your soil **Q: Can I use this in a hot tub** A: Why not just buy the correct product at a pool supply store (or Lowe’s, Home Depot, etc)? **Q: Hi.. Hydroponic newbie! is this considered "organic" compared to other ph up/down products sold? Thanks so much.** A: The ingredients are potassium carbonate and phosphoric acid. I couldn't tell you anything beyond that. Sorry ## Customer Reviews ### ⭐⭐⭐⭐⭐ Helped Cure My Hydroponic PH Blues *by on Reviewed in the United States November 9, 2018* 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! ### ⭐⭐⭐⭐⭐ Does what it says *by on Reviewed in the United States December 21, 2025* Easy use good product does what it says ### ⭐⭐⭐⭐⭐ A little goes a long way! *by on Reviewed in the United States June 26, 2023* 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. ## Frequently Bought Together - Atlas Scientific pH Up and Down 250ml (8oz) - VIVOSUN Digital pH and TDS Meter Kits, 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Pool and Aquarium, Yellow Blue, UL Certified - General Hydroponics CALiMAGic 1-0-0, Concentrated Blend of Calcium & Magnesium, Secondary Nutrient Deficiencies Helps Prevent Blossom End Rot & Tip Burn, Clean, Soluble, 1-Quart --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/13731106-atlas-scientific-ph-up-and-down-250ml-8oz](https://www.desertcart.hr/products/13731106-atlas-scientific-ph-up-and-down-250ml-8oz) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-15*