Cookie Policy
We use cookies to help improve the experience you have on this site. You can find out more here.
Hanna Marine Alkalinity Checker
Hanna Marine Alkalinity Checker
- Designed to accurately test alkalinity in marine aquariums
- Small palm-sized design
- Accurate from ±0.3 dKH ± 5% of reading
- Dedicated to a single parameter
- Uses a single AAA battery
- Auto Power Off after 10 minutes in inactivity
- Built-in timer for timed reaction readings
Ideal for salt water aquariums and coral reef tanks. Designed exclusively for saltwater aquariums, the HI-772 checker offers a quick, easy and highly accurate method of measuring alkalinity in degrees of calcium hardness, commonly abbreviated as dKH.
Alkalinity helps to maintain a stable pH, a vital factor for most aquatic life. Corals also need an adequate level of alkalinity in order to support healthy growth: if levels are too low, corals cannot precipitate and form their skeletons; if levels fluctuate too much or too quickly, growth can become impaired.
The more precise and stable the levels, the better the results. With regular, precise monitoring, fluctuations in levels can be quickly corrected, giving your corals the best chance of success.
Key Features:
Test Results in 4 Easy Steps
Quick results from a single button in 4 easy steps. First zero the Checker with an empty vial inside. Next place a 10ml water sample inside the vial and add the included reagent. Return the now full vial to the checker. Press the button and read the result.
More Accurate than Chemical Test Kits
The checker uses a Colorimetric method. The reaction causes a distinctive range of colours from yellow to green to blue to develop. The result given is accurate to ±0.3 dKH between 0 to 20 dKH. Most chemical test kits on the market are only accurate to ±1 dKH.
Hand-held Portable Design
Small compact size with a single button and powered by only one AAA battery (included) makes these Checkers from Hanna Instruments incredibly versatile and portable. Perfect for aquarists, aquaculturists, fish keepers, and even scientists in the field.
Contents
- HI-772 Alkalinity Checker®HC
- Sample Cuvettes with Caps (x 2),
- Reagents Starter Kit (x 25)
- Battery
- Instruction Manual
- Quick Start Guide.
| Ammonia | Nitrite | Phosphate | Alkalinity | Nitrate | Phosphate | Calcium | |
| Model | HI-700 | HI-707 | HI-713 | HI-772 | HI-781 | HI-774 | HI-758 |
| Suitability | Freshwater | Marine/Freshwater | Marine/Freshwater | Marine | Marine | Marine | Marine |
| Tests For | NH3-N | NO2-N | PO₄³⁻ | dKH | NO₃- | PO₄³⁻ | Ca |
| Range | 0.00 to 3.00 ppm | 0 to 600 ppb | 0.00 to 2.50 ppm | 0.0 to 20.0 dKH | 0.00 to 5.00 ppm | 0 to 999 ppb | 200 to 600 ppm |
| Resolution | 0.01 ppm | 1 ppb | 0.01 ppm | 0.1 dKH | 0.01 ppm | 1 ppb | 1 ppm |
| Accuracy | ±0.05 ppm | ±20 ppb | ±0.04 ppm | ±0.3 dKH | ±0.25 ppm | ±15 | ±6% |
| Dimensions | 82 x 61 x 38 mm | 82 x 61 x 38 mm | 82 x 61 x 38 mm | 82 x 61 x 38 mm | 82 x 61 x 38 mm | 82 x 61 x 38 mm | 82 x 61 x 38 mm |
| Weight | 64g | 64g | 64g | 64g | 64g | 64g | 64g |
| Battery | 1 x AAA | 1 x AAA | 1 x AAA | 1 x AAA | 1 x AAA | 1 x AAA | 1 x AAA |
Delivery
Delivery costs for your order will be calculated during the checkout process based on your delivery address and the contents of your basket. You will only pay one delivery charge for your order. Express delivery is FREE for online orders OVER £39 unless any of the points below become a factor.
- Some large items like aquariums, ponds and pond liners will have an additional charge of £45.00 to help offset the cost of a pallet delivery.
- Orders containing a physical gift card will have an additional charge of £2.45 to cover the cost of materials and delivery (digital gift cards are a free alternative).
- Orders to highlands, islands and Northern Ireland may incur an additional delivery charge displayed at checkout this is based on the postal code provided. DPD provides a list of postal codes which have additional surcharges. Some of these post codes may also take 2 working days to arrive, even on express. Pallet deliveries cannot be sent to these post codes.
We only ship to the UK and cannot ship internationally.
We aim to dispatch items that are currently in stock on the same working day if they are ordered before 2.45 pm (excluding Bank Holidays). Orders after 3pm will be dispatched the following working day, unless it fits any of the below criteria:
- Orders containing live plants will take up to 2 weeks to arrive. We take a week's worth of customer orders and then inform the plant farms of the specific quantities we need to fulfil that week's order to avoid wastage.
- Pallet orders containing large items like big aquariums will take additional time to arrive as they are sent by a third party. These orders will NOT be dispatched until we have been in touch to arrange a delivery date, this is to ensure someone is available at your address to sign for the delivery. Deliveries will generally be delivered ‘curb side’ within the terms of the agreement we have with our couriers so you will need to make arrangements to transfer larger items into your home yourself. Unfortunately, our drivers are not insured to transfer the aquarium into your home.
- Physical gift cards and items from the gift shop (such as clothes, towels etc) are sent with 1st Class Royal Mail. Delivery usually takes 1-2 working days, though in rare cases and orders placed closer to public holidays (Christmas, Father’s day, Mother’s day etc.) may be longer.
Returns
If you are not 100% satisfied with your purchase online from our website, you can return the product and get a full refund or exchange the product for another one, for up to 21 days from the date you purchased it.
We strongly suggest signing up for an account with fishkeeper.co.uk as this will allow for some additional returns options like return to your local store.
If you checkout as a guest you will need to return the product to Maidenhead Aquatics, PO Box 619, Egham, Surrey, TW20 2BS, please package the order (along with a packing slip or a note including your name, address and order number).
Large pallet items like aquariums are deemed delivered successfully with no damage once the the driver has left the property. If a report of damage is submitted after the driver has left we may be unable to assist with replacements. We recommend refusing a damaged delivery, this is the fastest resolution.
Our full terms and conditions can be found here. When you place an order with us online you are agreeing to these terms and conditions.
For delivery before Christmas, orders must be placed on or before 3pm on Wednesday 20th December. We cannot guarantee delivery of these orders pre-Christmas as we are reliant on our couriers, but will use our best endeavours to get orders placed on this date out to you before Christmas. For full details of our festive delivery and opening times click here
Please note: online orders placed after 3pm on Friday 22nd December will not be dispatched until the New Year. For full details of our festive delivery and opening times click here