Description
Quick Answer
HY-GEN PK TOP UP is a concentrated flowering and fruiting additive that supplies soluble phosphorus, potassium and chelated trace elements. It is intended for growers using soil, foliar programs, run-to-waste or recirculating systems once flowers begin to form. TG Hydroponics offers 1L, 5L and 20L variants.
Product Description
HY-GEN PK TOP UP supplements a complete base nutrient program during flowering and fruit development. Its phosphorus and potassium content is paired with chelated manganese, copper and zinc plus boron and molybdenum. Use it as a stage-specific additive rather than as a complete standalone nutrient.
The liquid is suitable for soil applications and hydroponic programs, including run-to-waste and recirculating systems. HY-GEN also identifies foliar use. Always follow the current product label or HY-GEN feed schedule for the crop, growth stage and application method.
Key Features
- Provides soluble phosphorus and potassium for the flowering and fruiting stage
- Contains chelated manganese, copper and zinc, plus boron and molybdenum
- Suitable for soil, foliar, run-to-waste and recirculating applications
- Designed to begin when flowers or buds become visible
- Water-soluble liquid that mixes throughout the working solution
- Available from TG Hydroponics in 1L, 5L and 20L sizes
Available Sizes and Variants
| Shopify variant | Typical use |
|---|---|
| 1L | Small gardens and lower-volume programs |
| 5L | Regular flowering and fruiting programs |
| 20L | Higher-volume growing operations |
Choose the size that suits your reservoir volume and application frequency. All three options contain the same HY-GEN PK TOP UP formulation.
Specifications
| Brand | HY-GEN |
|---|---|
| Product type | Phosphorus, potassium and trace-element flowering additive |
| Growth stage | Flowering and fruiting; begin once flowers form |
| Compatible applications | Soil, foliar, run-to-waste and recirculating systems |
| Appearance | Clear pale blue-green liquid |
| pH | 3.9–4.3 |
| Solubility | Soluble in water in all proportions |
| Key declared components | Potassium phosphate; chelated manganese, copper and zinc; boron; molybdenum |
| Available sizes | 1L, 5L and 20L |
Package Contents
- 1 × HY-GEN PK TOP UP container in the selected 1L, 5L or 20L size
Directions for Use
- Shake the closed container before measuring.
- Begin using HY-GEN PK TOP UP when flowers or buds start to form.
- Measure the amount specified by the current label or official HY-GEN feed schedule for your crop and growth stage.
- Add the measured product to water or the working nutrient solution and mix thoroughly.
- Apply through the intended soil, foliar, run-to-waste or recirculating program as directed.
- Monitor the working solution and flush hydroponic systems regularly.
Important: Do not assume one universal dose. Application rates can vary by crop, stage and feeding program; use the current label or HY-GEN schedule.
Care, Storage and Safety
- Keep the container closed and store it in the original packaging in a cool, dark place.
- Avoid contact with eyes and prolonged contact with skin. Wash hands after handling.
- If the product enters the eyes, rinse with running water for at least 15 minutes and seek medical attention.
- Do not swallow. If a significant amount is swallowed, seek medical advice.
- Prevent concentrated product or spills from entering drains and waterways.
- Keep out of reach of children and follow the current label and Safety Data Sheet.
Frequently Asked Questions
What is HY-GEN PK TOP UP?
HY-GEN PK TOP UP is a concentrated phosphorus, potassium and trace-element additive for flowering and fruiting plants.
When should I start using it?
Start when flowers or buds begin to form, following the current HY-GEN label or feed schedule.
Is it a complete base nutrient?
No. HY-GEN PK TOP UP is a stage-specific additive intended to supplement a complete base nutrient program.
Can it be used in hydroponics?
Yes. HY-GEN lists both run-to-waste and recirculating systems as suitable applications.
Can I use it in soil?
Yes. Soil application is listed by HY-GEN. Follow the current label for the appropriate rate and method.
Is foliar application supported?
Yes. HY-GEN identifies foliar use, but the rate and timing should come from the current label or official schedule.
What sizes are available from TG Hydroponics?
The live Shopify product offers 1L, 5L and 20L variants.
What colour is the liquid?
The official Safety Data Sheet describes it as a clear pale blue-green liquid.
How much should I use?
Use the amount on the current label or HY-GEN feed schedule. The correct rate depends on the crop, stage and feeding program.
How should I store HY-GEN PK TOP UP?
Keep it closed in its original container and store it in a cool, dark place.
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Customer Reviews
Absolute game-changer. Fair dinkum, this is the best bit of kit I've bought in ages. Does exactly what you need it to do, no mucking about. Too easy!
Really happy with this. The quality is ace and the price was spot on. The team in Sunshine North were super helpful when I called up with a question.
Deadset legend, this product. Took my grow to the next level. So glad I found this site, the range is massive. Will be back for more.
Quality is unreal. You can tell it's not cheap rubbish. It's a proper bit of gear that does the job well. Postage was lightning fast too.
Heaps good! Does the job perfectly and didn't cost an arm and a leg. Arrived in Brissy super quick. Can't complain.
This is a proper bit of kit. Sturdy, reliable, and has made a huge difference. You guys are lifesavers. Cheers!
Couldn't be happier with this. It's the bee's knees, honestly. My setup is looking schmick now. Will be telling all my mates.
Solid gear, fair price. It's hard to find good quality stuff these days but this is the real deal. Arvo well spent setting it up.
Bloody brilliant. Does exactly what it promises and then some. A real workhorse for the grow room. Can't fault it.
I'm stoked with this purchase! Made a huge difference to my plants' health. The delivery was super quick to Adelaide. Top stuff!

















