NT LABS Marine Lab pH Test - 40 Tests

What is pH?

The pH is the measure of how acidic or alkaline water in your aquarium is. The pH scale runs from 0 to 14. Very acidic water is pH 0 and very alkaline water is pH 14, while water that is neither acid or alkaline is pH 7 and described as neutral.

Why test for pH?

Most marine organisms have evolved to optimally live in a narrow pH range. Deviations away from their preferred pH can result in stress, poor health and ultimately, death. As aquarium water tends to acidify with age, regularly testing the pH of the water is the only reliable method of ensuring that the pH is correct for the aquarium’s inhabitants.

What is the correct pH level in my aquarium?

The pH in a marine aquarium should be approximately 8.3. In addition to meeting this pH range, a stable pH is equally important. Rapid fluctuations in pH can be just as detrimental as the wrong pH. As KH (carbonate hardness) is strongly correlated with the stability of the pH, KH should also be monitored at the same time as pH.

What to do if my pH is wrong?

If the pH is outside of the desired range, test and ensure that the KH is also correct. To safely increase the pH and the KH, use Marine Buffer Powder. When the KH is correct, the pH should return to the normal range. Excessively high pH (and KH) can be caused by inappropriate décor or overuse of some calcium supplements; identify the precise cause and carry out partial water changes to dilute high KH and restore the pH to the required range.

How to test for pH?

• Add 5 ml of water to be tested into the test tube provided. The middle mark on the test tube indicates 5 ml.
• Add 5 drop of the pH reagent to the test tube, cap the test tube and then shake.
• Immediately view the test tube from the side and compare to the colour chart to determine the pH of the water.

Payment Methods

We accept all major Credit and Debit cards, and these are processed via a third party payment gateway called Opayo. 

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Also, you can pay using Android and Apple Pay if you are using a compatible device. 

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

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Our website is run on Visual Soft, which means all your data is stored securely on their servers. 

Next Day Shipping cut off is at Noon/12:00pm

Orders after that time will be processed the next working day

Please Note: Certain ponds, aquariums, all pond plants, and all livestock are excluded from free delivery.

The blue highlighted area on the map below is where we deliver on our own vehicle. Unfortunately, if you are not in one of these postcode zones we are unable to deliver certain items such as plants, small glass items and selective other products.

We offer a few different delivery options depending on the size and value of your order.

Certain orders over £50 qualify for free mainland UK (excludes Northern Ireland, Pond Plants, and livestock) delivery which will arrive within 3-5 working days of the order being processed.

Orders Below £50 in Mainland UK will be charged a standard delivery fee of £5.99.

Pond Plant and Tropical/Marine/Pond Livestock will be charged a delivery fee of £19.99.

Additional Shipping Charges

For any orders that do not include Aquariums, the below is charged:

Next Working Day Parcel Delivery to Mainland UK - £7.99 OR £2.99 if the order is over £50 (excludes Northern Ireland)

Standard Parcel Delivery to Northern Ireland £8.99

Standard Parcel Delivery to Scottish Highlands & Islands £9.99

Standard Parcel Delivery to Jersey & Guernsey £12.99

For all Aquarium, Medium - Extra Large Terrarium/Vivarium/Paludarium deliveries (Excluding biOrbs & Smaller Aquariums), the below is charged:

You must be present for delivery and please check your item before signing for delivery.

A payment link will be sent to you if redelivery is required.

Next Working Day Pallet Delivery - £20

2 Hour Booking Slot Pallet Delivery - £20

Pallet Delivery to Northern Ireland - £45

Saturday and OptiClear 90 & 120 Delivery - £60

Pallet Delivery to Isle of Wight (PO30 and Above) and Scottish Highlands (AB, PH, IV1-36, IV, KW1-14, KY, PA21-41) - £45

Pallet Delivery to the Scottish Isles (KA27-28, PA60-90, ZE, JE, GY, IM, IV40-56, KW15-17, PH42-44, PA20, PA42-49) - £120

Pallet Delivery to Outer Hebrides (HS) - £140

Pond's over 1000 litres will be a curb side pallet delivery.

Aquariums over 125 litre will be a curb side pallet delivery.

The couriers we use are Royal Mail, DX, APC, and UPN.

Standard Delivery

Northern Ireland Standard Delivery

Next Day Delivery

Cut off is Noon/12:00pm

Saturday Delivery

Cut off is Noon/12:00pm

Livestock Delivery

Cut off is Noon/12:00pm

Plant Delivery

Cut off is Noon/12:00pm

Standard Curb Side Pallet Delivery

Cut off is Noon/12:00pm

Next Day Curb Side Pallet Delivery

Cut off is Noon/12:00pm

Saturday Curb Side Pallet Delivery

Cut off is Noon/12:00pm

Northern Ireland Curb Side Pallet Delivery