JBL PROAQUATEST Mg Magnesium Refill

The right water values are dependent on the fish stock, any algae present and the corals. Even if the water looks clear it can be contaminated. With bad values diseases or algae can appear in the aquarium. To maintain a healthy aquarium with conditions close to nature it is important to check and adapt the water values regularly.

Why test?

Along with calcium, magnesium creates the general hardness. Magnesium is, like potassium, a macroelement, which is necessary for the healthy and vigorous growth of corals. Too low calcium and magnesium levels affect coral growth and prevent beautiful calciferous red algae from growing.

Recommended calcium values: Marine water aquarium: 1200-1600 mg/l

You can analyse the water values you have measured in the JBL Online Laboratory free of charge and receive recommendations.

In recent years we had observed that our magnesium test with the factor 100 was showing too little magnesium. On expeditions to the “original marine water,” however, we were still able to measure the correct values, and this indicated that the low measurements were due to the artificially prepared marine water.

After that we carried out extensive tests with the various salt mixtures available on the market from various suppliers. The difference to original marine water came from the recently used magnesium salts and trace elements in the sea salt mixture, which caused a deviation of about 20-30%.

After our tests we modified the instructions in order to increase the multiplication factor from 100 to 120 in order to adapt it to the sea salt mixtures currently on sale.

As a result we can once again carry out precise measurements on artificial sea salts by using factor 120. With natural marine water we still use factor 100.

Payment Methods

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

We also accept payments via PayPal, PayPal credit, Clearpay and Klarna which are both pay in 4 interest-free instalments. 

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.

Security

When speaking to one of our team, we will never ask you for your bank details, passwords or any private information. We will only ever ask for your order number followed by either your postcode, email address or phone number to verify we are talking to the person named on the account. 

When creating an account on our website, we ask that you use a unique password, this will help keep all your online accounts safe. If you are visiting our website via a smartphone we suggest you use the strong password and store it securely on your phone. 

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