pH Up and Down | pH Control Kit | Hydroponic pH Adjuster

You get one 250 ml bottle of pH Up and one 250 ml bottle of pH Down, a measuring cup, a dropper, pH test strips and a colour chart. That covers both directions of adjustment and gives you a way to check the water before and after you dose. Nothing else is listed as included in this record.

It is used to move the pH of your water or nutrient solution into the range your plants prefer. pH Down lowers a reading that is too high, and pH Up lifts one that is too low. Keeping the solution in range helps roots take up the nutrients you have already mixed in.

The listing suggests a working range of 5.5 to 6.5, which covers most common hydroponic and container growing. Different plants sit at slightly different points inside that band, so check the preference of what you are growing. Aim for a stable reading rather than chasing a single perfect number.

The guide dose given is about 3 ml per litre, which is roughly one tablespoon per gallon. Treat that as a starting reference, not a fixed rule, because tap water hardness varies a lot. Add a small amount, stir, wait a few minutes and test again.

The pH Down solution is formulated with phosphoric acid. That is a common choice for a hydroponic pH adjuster because it also contributes phosphorus to the solution. Wear gloves when you handle it and keep it well away from children.

The pH Up side uses buffering agents to raise a low reading. The record does not list a specific active ingredient beyond that description. Treat it with the same care you would give any concentrated garden solution.

The strips in this kit give you a fast colour-coded check, which is handy for a quick look between measurements. A pH meter gives you a finer reading and is worth having if you run a larger reservoir or want tighter control. Many growers use both, with strips as the convenient everyday check.

You dip a strip into the solution, wait the moment the strip packaging suggests, then compare the colour against the printed chart. The chart matches colours to pH values so you can read the result without any equipment. It is a visual comparison, so check it in good light.

Yes. The kit is described as suitable for soil gardens as well as hydroponics, so you can adjust the water in your watering can before it goes on the beds. Soil has its own buffering, so changes show up more slowly than they do in a reservoir. Test the water going in rather than expecting an instant change in the soil itself.

It does. Coco coir is listed among the compatible mediums, and growers using coco often need both bottles, since readings in coco can drift in either direction. Check your run-off as well as your input water to see what is actually happening at the roots.

Aquaponics is listed as a compatible use, but aquaponic systems hold fish and beneficial bacteria, so changes need to be very gradual. Make small adjustments across several hours rather than one large dose. If you are new to aquaponics, follow the guidance for your particular system and stock.

The listing states it is compatible with hydroponic nutrients and soilless mediums. Always mix your nutrients into the water first, then test and adjust the pH afterwards, because nutrients change the reading. Dosing before you add nutrients means you will just have to do it again.

That depends entirely on your water, your reservoir size and how often you change solution. Because the formula is concentrated and the guide dose is small, a home grower will typically get a lot of adjustments out of 250 ml of each.

The kit is described as suitable for indoor and outdoor plants including vegetables, herbs, flowers and lawns. For large outdoor areas the volume of water involved makes it less practical, so it is better suited to pots, beds and smaller watering routines. Measure the water you are treating so you can dose sensibly.

Yes, the listing advises shaking well before use so the solution is consistent. Give each bottle a firm shake with the cap on, then let it settle for a second before pouring. This matters most if a bottle has been sitting unused for a while.

Your reading will drop below where you want it, and you will need a small amount of pH Up to bring it back. This is exactly why the dropper is included and why the advice is to add gradually. Overshooting wastes solution and stresses plants, so slow is better.

We recommend wearing gloves with the pH Down solution, since it contains phosphoric acid. Avoid skin and eye contact, and rinse with water straight away if any splashes. Work over a sink or tray where possible so spills are easy to deal with.

Keep both bottles capped tightly, upright, and in a cool dark place away from direct sun. Store them out of reach of children and pets, and well away from food and drink. The cup and dropper should be rinsed with clean water and dried before being put away.

No. They are designed to work against each other, so combining them directly is pointless and messy. Use one or the other depending on which way your reading needs to move, and always measure between doses.

Daily is a good habit for an active hydroponic reservoir, because pH drifts as plants drink and as nutrient levels change. For soil pots, testing the water you pour on is usually enough. If you are troubleshooting a problem, test more often until the reading settles.

Plants take up nutrients at different rates, which shifts the balance of the solution, and evaporation concentrates what is left behind. Small reservoirs drift faster than large ones. Regular testing with your pH control kit and small corrections keep things steadier than occasional big fixes.

Absolutely. For small volumes, use the dropper to add tiny amounts to a jug or watering can, then test before you pour. This is one of the easier ways to use a pH adjuster, since the water volume is small and predictable.

Harder water usually resists change more, so it often takes a slightly larger dose to shift the reading. That is why the 3 ml per litre figure is a guide rather than a rule. Work out the dose your own water needs once, note it down, and repeat it next time.

Yes. Having both solutions, a dropper, a cup, strips and a chart in one box removes most of the guesswork from your first pH adjustments. Start with small doses, test often, and you will quickly learn how your water behaves.

It is better to keep the cup for pH solutions only, or rinse it very thoroughly between uses. Mixing residues can throw off your doses and waste product. A second cheap measuring cup for nutrients is a simple fix.

Test strips generally work best when kept dry and sealed, and they can become less reliable if they get damp. Keep the container closed and your fingers dry when taking one out. If colours start looking odd or faded, replace the strips.

No. The kit includes test strips and a colour chart for quick visual checks, not a digital meter. If you want a numeric reading, a separate pH meter is a useful companion to this kit.

It works well as a practical gift for anyone running a hydroponic setup, a coco coir grow or a serious container garden. It is the sort of thing growers need but often put off buying. Pair it with a pH meter if you want to make it a more complete present.

Delivery is New Zealand wide. Orders are dispatched within 2 working days and then arrive within 7 working days by tracked courier. Delivery is free on orders of $50 or more, and a flat $22.00 otherwise.

Yes. You can return it within 15 days of delivery under our refunds and returns policy, which also explains how to send it back and who pays the return postage. Your rights under consumer law are not affected.