The newest Bio-filter Medium
suitable for 21st Century
Crystal Bio is made from a glass substance. It has an extraordinary porous structure of light-weight ceramic, which is obtained by burning the mixture of glass substance particles and foaming agent at high temperature of 900 degrees.
Crystal Bio itself is a little alkaline and can buffer the pH of rearing water.
Comparison between Crystal Bio and plastic filter commonly used on koi farms
Nitrogen derived from ammonia
The blue line remains below 0.4mg/L level for a long time.
This result indicates that Crystal Bio’s porous structure is superior as a habitat for microorganisms including nitrifying bacteria.
Nitrogen derived from nitrous acid and nitric acid
NO2-N concentration increases faster, and in greater amount, in Crystal Bio treated water than by a plastic filter. It suddenly drops after the twenty-eighth day after the beginning of the test.
As for NO3-N concentration, it remains below 10mg/L by Crystal Bio treatment.
The blue line shows that the pH of the rearing water treated by Crystal Bio gradually decreases and keeps the water within a weak alkaline level until the 26th day after the beginning of the test, and then is gradually acidified.