TNC GH Boost

Rated 5.00 out of 5 based on 1 customer rating
(1 customer review)


  • Boosts General hardness of tank water
  • Increases Magnesium, Calcium & Potassium levels
  • Ideal for the soft, rain or RO water user
  • Simple to use powder

(Sizes – 300g|600g|1.2Kg)

SKU: TNC GH Boost Categories: ,

Product Description

TNC GH Boost contains Calcium, Magnesium and Potassium salts. Added to your tank it will increase the water hardness and the levels of these three nutrients – all of which are essential for healthy plants.
GH stands for General Hardness – sometimes referred to as permanent hardness. It is the measure of the Calcium and Magnesium salts dissolved in the water supply and is measured in degrees (°GH or dGH)
Although both Calcium and Magnesium can be found in most domestic water supplies, the quantities can vary depending on where you live. If the water is described as ‘soft’ there may be very little, if any, of either. This can result in plants showing signs of Calcium and/or Magnesium deficiency.
If RO water, rain water or soft water from the tap is used in the aquarium then Calcium and Magnesium should be added.

To check the hardness of your water, you could use a test kit or you could check on your water suppliers website if you are using tap water.


1tsp of TNC GH Boost will increase the hardness of 100 litres of water by approx. 1 dGH.

If you are using TNC GH Boost as a supplement to an EI dosing system, add straight away after your weekly water change. You will not normally need to add any extra Magnesium Sulphate

K 13.5% (K2O 13.2%),Ca 9% (CaO 12.5%), Mg 3% (MgO 5%)

1 review for TNC GH Boost

  1. Rated 5 out of 5

    michael bunn (verified owner)

    This is an excellent product. The tap water where I am is very soft with a gh of 3. 1.5 teaspoons of this at every water change boosts gh to 6 or 7 which is ideal for a planted tank. Takes a little while to fully disolve but does the job perfectly and is much, much cheaper than off the shelf products. Top marks and will be ordering again in the future.

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