pH Up by Flairform — Concentrated Potassium Carbonate pH Adjuster
FF-PHC-UP-250
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Pairs well with
Flairform pH Up is a concentrated potassium carbonate solution for raising nutrient pH in hydro, coco and soil. At 600g/L it delivers the working strength of a 400g/L potassium hydroxide solution — without the caustic handling problems. It's classified as a non-dangerous good, so there are no special freight, storage or handling requirements, and it's much safer to use and more environmentally friendly than hydroxide-based pH ups. Available in 250ml and 1L.
Specifications
- Check pH when the nutrient is first mixed, after adding top-up water or additives (especially alkaline ones), and daily in recirculating systems — water and nutrient uptake shift pH constantly.
- Don't let pH sit high for long. The precipitate that forms usually won't re-dissolve, and those nutrients are lost to your plants.
- Safer than hydroxide doesn't mean harmless — this is still a concentrated alkaline solution. Gloves and eye protection are smart, and dose gradually with mixing between checks.
How to Use
Pairs Well With
A pH adjuster is only as good as the meter reading it follows — keep yours calibrated.
Flairform Electrode CleanerDon't leave probes sitting in concentrates like pH Up — and clean them if you have.
pH Control & CalibrationpH Down, buffers, storage solutions — everything for dialled-in nutrient pH.
Frequently Asked Questions
How is this safer than regular pH Up?
Regular pH Up solutions are typically potassium hydroxide — genuinely caustic, HazMat-classified and a burn risk. Flairform uses concentrated potassium carbonate instead: equivalent working strength, much safer to handle, more environmentally friendly, and classified as a non-dangerous good.
Does it still need careful handling?
Yes. It's a concentrated alkaline solution and the safety data sheet lists it as an eye and skin irritant, so gloves and eye protection are sensible. Safer than hydroxide, not harmless — treat it with the same respect as any concentrate.
How much do I add to raise pH?
There's no fixed dose — it depends on your water, nutrient strength and reservoir size. Because it's concentrated, add small amounts, mix, and re-test until you hit target. Flairform's online dosage calculator can give you a starting point.
How often should I check nutrient pH?
When the nutrient is first made, after any top-up water or additives, and daily in recirculating systems — water and nutrient uptake shift pH continuously. Letting pH sit too high forms precipitate that usually won't re-dissolve.
Can I use it in soil and coco as well as hydro?
Yes. Flairform pH Up is formulated for hydro, coco and soil — adjust your feed water or reservoir the same way regardless of substrate.
Hydroxide Strength Without the HazMat
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