GH UP ADDITIVE

GH or General Hardness refers to the mineral content in water, which includes calcium, magnesium, borate, silica, and iron.

These metal ions are a result of carbonic acid within rain dissolving mineral-rich rock, such as limestone, as it runs naturally through layers of sediment, rivers, and streams. Along the way the water picks up dissolved minerals, and the more minerals it picks up, the harder the water is considered.

General Hardness is used to determine the total dissolved mineral concentration in water to ensure it’s safe (or ideal) for fish keeping.

Depending on where you live, your source water will have varying degrees of hardness, and different trace elements.

Note: The different terms for water hardness are commonly confused with “carbonate hardness”, which actually has nothing to do with water hardness and is a different topic altogether. (see KH Buffer)

General Hardness is a group of minerals that help provide a healthy environment for your Koi and Beneficial Bacteria to thrive, also it can be associated with maintaining good water clarity.

How to test GH?

We sell a simple drop test kit that quickly identifies the amount of GH / General Hardness in your pond water (see related products below)

Dose Rate

35g for every 220 gallons / 1000 litres of pond water.

Available in two sizes, 3kg and 10kg Buckets.

An ideal value for GH is between 8 – 12dh, however here at The Oaks we prefer to run our ponds at around 6dh.