Water management is the key to success in koi keeping.

The objective of carrying out a partial water change is to maintain a stable, quality pond environment for your koi.

Blanket weed (also referred to as string-algae) is a collective term given to a number of very similar algae that both look and behave identically.

Nothing is more frustrating to a pond keeper than nuisance algae, and from your description, it sounds as though your current algae problem is proving to be just that - a real nuisance.

It is fair to say, that blanketweed is the scourge of the koi pond.

Algae problems in koi ponds have risen to become one of the koi keeper's most common complaints.

Blanketweed is by definition, a weed, that is, a plant that is growing out of place.

How we manage and maintain the water in a pond will have a direct effect on the health and growth of our pond fish.

There a over a dozen different test kits available, each testing for a specific water parameter.

When maintaining a koi pond we need to understand, analyse, interpret and respond to a handful of chemical data, sometimes on a daily basis.

Time and time again we read and are told that water quality is of paramount importance when keeping fish, especially koi.

These bubbles are formed through the stabilising properties of complex dissolved compounds. These largely organic compounds, build up in the water over time to levels which encourage stable bubbles to form.

Tinged water is caused by an accumulation of dissolved organic compounds that when dissolved in your pond water, absorb and reflect light, changing the appearance of your water.

Koi benefit significantly from stable water conditions, where water quality parameters such as temperature, dissolved oxygen, ammonia and nitrite should be maintained within desirable levels.

You can't smell it, taste it, see it or hear it, in fact you can't even bottle it - So what is it? - pH

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