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

A Low and Fluctuating pH in My Pond. I became a koi keeper by accident two years ago when I [...]