Description
Quick Answer
HY-GEN pH Up & Down is a selectable range of concentrated liquid pH adjusters for hydroponic nutrient solutions. Choose pH Up when the measured pH is too low, or pH Down when it is too high. This Shopify listing supplies one selected bottle in 250mL or 1L; it is not an automatic controller and it is not a two-bottle kit.
Product Description
HY-GEN pH Up and HY-GEN pH Down let hydroponic growers manually correct nutrient-reservoir pH after water, nutrients and additives have been mixed. The current HY-GEN product pages identify pH Up as a 45% potassium hydroxide solution and pH Down as 85% food-grade orthophosphoric acid. Both are concentrated, highly soluble products supplied in child-resistant containers.
Because the required amount varies with water chemistry, tank volume and the nutrient program, no universal dose or target pH is stated. Test first, select only the direction required, pre-dilute the chosen adjuster and make small changes while re-testing.
Key Features
- Two adjustment directions: pH Up raises nutrient-solution pH; pH Down lowers it.
- Four live variants: pH Down 250mL, pH Down 1L, pH Up 250mL and pH Up 1L.
- Concentrated liquid formulas: designed for controlled, manual adjustment in hydroponic growing systems.
- Highly soluble: formulated to be pre-diluted in water before entering the nutrient tank.
- Child-resistant caps: added container safety does not replace careful handling or personal protective equipment.
- Clear selection: each variant is a single bottle, so choose Up or Down and the required size.
Available Sizes and Variants
| Shopify variant | Function | Size |
|---|---|---|
| PH DOWN 250ML | Lowers pH | 250mL |
| PH DOWN 1L | Lowers pH | 1L |
| PH UP 250ML | Raises pH | 250mL |
| PH UP 1L | Raises pH | 1L |
Selection note: HY-GEN also manufactures other pack sizes, but this live TG Hydroponics listing currently offers only the four variants above.
Specifications
| Brand | HY-GEN |
|---|---|
| Product type | Manual liquid pH adjuster for hydroponic nutrient solutions |
| pH Up function | Raises pH when the measured nutrient solution is too low |
| pH Up formula | 45% potassium hydroxide solution, according to the current HY-GEN product page and bottle reference |
| pH Down function | Lowers pH when the measured nutrient solution is too high |
| pH Down formula | 85% food-grade orthophosphoric acid |
| Available sizes in this listing | 250mL and 1L for pH Up; 250mL and 1L for pH Down |
| Application | Hydroponic growing systems and nutrient reservoirs |
| Container | Closed liquid bottle with child-resistant cap |
| Hazard classification | Manufacturer safety data sheets classify both concentrates as corrosive Class 8 dangerous goods |
Source note: HY-GEN’s linked pH Up safety sheet dated July 2016 lists 40% w/v potassium hydroxide, while the current manufacturer product page and current bottle reference state 45%. Follow the concentration, directions and current safety sheet supplied with the bottle you receive.
Package Contents
- 1 × selected HY-GEN pH Up or HY-GEN pH Down bottle in the chosen 250mL or 1L size
A pH meter, test kit, mixing container and the opposite-direction adjuster are not included unless separately purchased.
Directions for Use
- Put on suitable protective clothing, chemical-resistant gloves and eye or face protection.
- Prepare the nutrient solution first. Add the water, nutrients and additives required by your program, mix thoroughly and allow the tank to equilibrate. HY-GEN advises that this can take up to 60 minutes depending on tank size.
- Test the solution with a suitable pH meter or test kit.
- If pH is too low, select pH Up. If pH is too high, select pH Down. Do not use both concentrates together.
- Add only the required amount of the selected adjuster to a small, separate container of water and mix well.
- Add the diluted mixture gradually to the nutrient tank while mixing or circulating the solution.
- Allow 30–60 minutes, mix well, then re-test before making another small adjustment.
Important: No fixed dose suits every reservoir. Follow the current bottle label, the safety data sheet and the target range specified for your crop, nutrients and growing system.
Care, Storage and Safety
- These are corrosive concentrates that can cause serious burns. Avoid contact with skin and eyes.
- Wear rubber or plastic gloves, suitable protective clothing, and goggles or a face shield.
- Never mix concentrated pH Up and pH Down directly together. Pre-dilute only the selected product in a separate water container.
- Keep the bottle tightly closed, dry and secured in a well-ventilated area at room temperature. The manufacturer safety sheets recommend approximately 15–25°C and protection from direct sunlight and moisture.
- Keep the product inaccessible to children despite the child-resistant cap.
- For exposure, spills or disposal, follow the bottle label and current manufacturer safety data sheet and seek appropriate medical or poisons advice where required.
Frequently Asked Questions
Is HY-GEN pH Up & Down a two-bottle kit?
No. This page contains separate variants. The package contains one bottle of the selected product and size.
What is the difference between pH Up and pH Down?
HY-GEN pH Up raises nutrient-solution pH and contains potassium hydroxide. HY-GEN pH Down lowers pH and contains orthophosphoric acid.
Which sizes can I buy from this listing?
The live options are pH Up 250mL, pH Up 1L, pH Down 250mL and pH Down 1L.
Does this product test or automatically control pH?
No. It is a manual pH-adjustment concentrate. A separate pH meter or test kit is required to measure the solution before and after adjustment.
When should I test and adjust the reservoir?
Add water, nutrients and additives first, mix the tank and allow it to equilibrate. Test after that process, then select pH Up or pH Down only if an adjustment is required.
Can I pour the concentrate directly into the nutrient tank?
HY-GEN directs users to mix the required amount in a small, separate container of water before adding it to the nutrient tank.
How long should I wait before re-testing?
Mix well and allow 30–60 minutes before re-testing and making another adjustment.
How much pH Up or pH Down should I use?
There is no universal dose because reservoir volume, water chemistry and nutrient formulation differ. Make gradual changes, test between adjustments and follow the current label.
What pH should I target?
Use the range specified by your crop, nutrient program and growing system. This product raises or lowers pH but does not establish one universal target for every application.
Can I mix pH Up and pH Down together?
No. Never combine the concentrates. Select only the product needed for the measured direction of adjustment, pre-dilute it separately and re-test before any further correction.
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