Aquaforest AF Lab Mg Plus

Aquaforest AF Lab Mg Plus

Aquaforest AF Lab Mg Plus is a highly concentrated magnesium supplement for marine and reef aquariums, made for hobbyists who need to raise magnesium levels. It supports coral growth and helps keep calcium and pH levels where they should be.

Why Magnesium Matters in a Reef Tank

Magnesium allows corals to absorb calcium better, which supports healthy and balanced growth. When magnesium drops too low, the aquarium may be unable to hold proper calcium levels, and pH may fall. Mg Plus is designed to bring magnesium back up to the recommended range so your calcium and alkalinity routine can work as intended.

Key Benefits

• Highly concentrated magnesium formula for raising magnesium in marine aquariums
• Supports coral growth
• Helps maintain proper calcium and pH levels
• Helps corals absorb calcium for healthy, balanced growth
• Clear dose rate: 10 ml raises magnesium by 10 mg/l (ppm) in 100 l (27 US gal) of water

How to Use

• Before dosing, test your water for magnesium (Mg), calcium (Ca) and alkalinity.
• Compare your magnesium reading to the recommended reef range of 1180 – 1460 mg/l (ppm).
• If magnesium is low, dose according to the rate below.
• Do not raise magnesium by more than 100 ppm in a single day.

Dosage

• 10 ml of Mg Plus raises the magnesium level by 10 mg/l (ppm) in 100 l (27 US gal) of water.
• Recommended magnesium level: 1180 – 1460 mg/l (ppm).
• Maximum safe daily dose: 100 ml per 100 litres of water.
• Do not raise magnesium by more than 100 ppm a day.

Suitable For

• Marine and reef aquariums where magnesium has dropped below the recommended range
• Coral keepers who want to support growth and keep calcium and pH stable
• Hobbyists who test Mg, Ca and alkalinity regularly and dose to the results

Available Sizes

This supplement is offered in several pack sizes. The dose rate stays the same whichever pack you choose, so pick the size that suits the volume of your system and how often you need to top up magnesium.

Frequently Asked Questions

What magnesium level should I aim for in my reef aquarium?
The recommended level for reef aquariums is 1180 – 1460 mg/l (ppm). Test before you dose so you know how far your reading is from this range.

How much Mg Plus do I add to raise magnesium?
10 ml raises magnesium by 10 mg/l (ppm) in 100 l (27 US gal) of water. For example, a system of 100 l needs 10 ml for a 10 ppm increase.

What is the maximum amount I can dose in a day?
The maximum safe daily dose is 100 ml per 100 litres of water. Do not raise magnesium by more than 100 ppm a day.

What should I test before dosing?
Test magnesium, calcium and alkalinity before dosing. These parameters work together, and magnesium levels affect how well calcium is held in the water.

What can happen if my magnesium is too low?
A reduced magnesium level may leave the aquarium unable to maintain proper calcium levels, and it may also lower pH. Magnesium also helps corals absorb calcium for healthy growth.

Do I need a different dose for different pack sizes?
No. The dose rate describes the product itself: 10 ml per 100 l raises magnesium by 10 mg/l (ppm). Only the amount of product in the pack changes.

When can I expect delivery?

• Gauteng (Jhb/Pta) - 1-3 working days
• Nationwide (Cpt/Dbn+) - 2-5 working days
• Outlying Areas - 3-7 working days

All orders are sent via Economy Road, typically through Fastway or Internet Express Couriers*. Estimated timeframes are not guaranteed. Once the order is collected by the courier, we have no control over third-party logistics and cannot make any time promises.

If you prefer a faster 🚀 shipping option, we also offer The Courier Guy during checkout in the dropdown selection. Please note that this option is not free, and you must choose it to use it. Please pay careful attention to the cutoff times and delivery timeframe for these options during checkout.

Enjoy the convenience of collection points and lockers! 📦

No more waiting at home or at work for your delivery. Simply choose a collection locker or pickup point and collect your order when it suits you.

Delivery times to lockers and pickup locations typically range from 2–7 working days, depending on your location.*

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Collection timeframes:

• Bob Box: Collect within 2 days of receiving your collection notification.
• PUDO Lockers: Collect within 36 hours of receiving your collection PIN or SMS notification.

If a PUDO parcel is not collected within 36 hours, it will automatically be transferred to the nearest PUDO Kiosk or Depot at no additional cost. The parcel will then be held there for approximately 2 days before being returned.

Please ensure you collect your parcel within the applicable collection period. Uncollected parcels will be returned to the sender, and additional shipping charges may apply should the order need to be resent.