--- product_id: 390500655 title: "PH21402 Premium pH Down, 16 Ounce" brand: "microbe life hydroponics" price: "€ 52.89" currency: EUR in_stock: true reviews_count: 5 category: "Microbe Life Hydroponics" url: https://www.desertcart.es/products/390500655-ph21402-premium-ph-down-16-ounce store_origin: ES region: Spain --- # 16 oz precision dosing 3 electrolytes for osmotic balance Dual buffered pH adjusters PH21402 Premium pH Down, 16 Ounce **Brand:** microbe life hydroponics **Price:** € 52.89 **Availability:** ✅ In Stock ## Summary > 💧 Master your grow with precision pH control—because your plants deserve the best! ## Quick Answers - **What is this?** PH21402 Premium pH Down, 16 Ounce by microbe life hydroponics - **How much does it cost?** € 52.89 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/390500655-ph21402-premium-ph-down-16-ounce) ## Best For - microbe life hydroponics enthusiasts ## Why This Product - Trusted microbe life hydroponics brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Sterilized Purity:** Formulated with R/O and UV sterilized water to ensure contaminant-free nutrient solutions. - • **Electrolyte-Enriched:** Includes three key electrolytes to maintain optimal osmotic balance for thriving plants. - • **Precision pH Control:** Lower nutrient solution pH safely and effectively with just 1ml per 5 gallons. - • **Fast-Acting & Economical:** See pH drop in under 3 minutes—small doses go a long way, maximizing value. - • **Buffered Dual-Action Formula:** Combines two pH adjusters for stable, consistent results without plant stress. ## Overview Microbe Life Hydroponics PH21402 Premium pH Down is a 16-ounce solution designed to safely and effectively lower pH in hydroponic nutrient solutions. It features a dual buffered formula with two pH adjusters and three electrolytes to maintain osmotic balance, all mixed in purified R/O and UV sterilized water. Ideal for precise dosing, it acts quickly without harming plants, making it a must-have for serious growers seeking consistent, healthy yields. ## Description pH DOWN by Microbe Life Hydroponics is formulated with deionized and UV sterilized water and combine two pH adjusters for buffered effectiveness. It contains three electrolytes to help maintain osmotic balance. When used as directed, it will safely lower pH levels in nutrient solutions and never harm plants. Review: Unstable PH , i don't recommend it for hydroponics. Review: Very potent so literally your best bet is to use a 1ml syringe and add 1ml at a time. I treated 5 gallons of water with just 1ml bringing the ph down from 8.5 to 5.2. With that said the size is great for the value. The speed at which it takes effect is less than 3mins. It’s easy to use if you go slowly. Definitely measure out the dose, otherwise the ph will bottom out which can be saved with ph up but you’ll end up making a chemistry project instead of feed water. ## Features - It is formulated with R/O and UV sterilized water and combine two pH adjusters for buffered effectiveness - It contains three electrolytes to help maintain osmotic balance - It will never harm plants. - ML/pH DOWN safely lowers pH in nutrient solutions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00R9XGLA4 | | Customer Reviews | 3.6 3.6 out of 5 stars (388) | | Date First Available | 14 October 2015 | | Ingredients | Nutrient Solution | | Item model number | PH21402 | | Manufacturer | Ecological Laboratories Inc. | | Part number | PH21402 | | Power source type | Natural Gas | | Product Dimensions | 6.1 x 6.1 x 18.8 cm; 453.59 g | ## Product Details - **Brand:** MICROBE Life HYDROPONICS - **Item form:** Liquid - **Item weight:** 16 Ounces - **Product benefits:** Lowers pH - **UPC:** 097121214027 ## Images ![PH21402 Premium pH Down, 16 Ounce - Image 1](https://m.media-amazon.com/images/I/61G37Qz0ypL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐ Review *by K***D on 27 March 2024* Unstable PH , i don't recommend it for hydroponics. ### ⭐⭐⭐⭐⭐ Review *by V***T on 21 August 2025* Very potent so literally your best bet is to use a 1ml syringe and add 1ml at a time. I treated 5 gallons of water with just 1ml bringing the ph down from 8.5 to 5.2. With that said the size is great for the value. The speed at which it takes effect is less than 3mins. It’s easy to use if you go slowly. Definitely measure out the dose, otherwise the ph will bottom out which can be saved with ph up but you’ll end up making a chemistry project instead of feed water. ### ⭐⭐⭐⭐⭐ Review *by R***E on 8 April 2025* Super ! Enfin plus facile abaissé le PH ## Frequently Bought Together - Microbe Life Hydroponics pH Down pH Control Liquid, Premium Buffering for pH Stability, Decreases pH Levels, Use with Any Feeding Systems Including Hydroponics or Soil, 16 Ounces - PH Meter for Water Hydroponics Digital PH Tester Pen 0.01 High Accuracy Pocket Size with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium - Microbe Life Hydroponics pH Up pH Control Liquid, Premium Buffering for pH Stability, Increases pH Levels, Use with Any Feeding Systems Including Hydroponics or Soil, 16 Ounces --- ## 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.es/products/390500655-ph21402-premium-ph-down-16-ounce](https://www.desertcart.es/products/390500655-ph21402-premium-ph-down-16-ounce) --- *Product available on Desertcart Spain* *Store origin: ES* *Last updated: 2026-05-23*