pH
> 8 Basic
Add Colombo pH min.
7 Optimal
Maintain water with Colombo Liquid Filter.
< 6 Acid
Add Colombo KH+.
KH
> 12°DH Too high
Change 25% of the water with water with a low KH,
if tap water has a high KH use demineralised water.
5 - 12 Optimal
Maintain water with Colombo Liquid Filter.
< 5 Too low
Add Colombo KH+.
GH
> 15°DH Too high
Change 25% of the water with water with a low GH,
if tap water has a high GH use demineralised water.
8 - 15 Optimal
Maintain water with Colombo Liquid Filter.
< 8 Too low
Add Colombo GH+.
NO
2
> 0,5 mg/l Dangerously
Change at least 50% of the water directly and add
high
Colombo Supersafe. Support the filter with Colombo
Bactuur and Liquid Filter. After water change test
NO
2
again.
0,25 - 0,5 Too high
Add colombo Bactuur and Liquid Filter to support the
filter.
0 Optimal
Our advice, check also NH
3
with separate dripping test.
NO
3
> 40 mg/l Too high
Change water immediately and add Colombo
Supersafe start using Colombo Liquid Filter regularly
to prevent the build-up of Nitrates.
20 - 40 mg/l A bit too high Add Colombo Liquid Filter regularly to prevent the
build-up of Nitrates.
< 20 mg/l Optimal
Our advice, check also NH
3
with separate dripping test.
Remark:
Values as mentioned above are guidelines for general freshwater aquariums. Special aquaria,
such as for Discus or a plant tank can demand a different water quality and composition.
Ask your aquarium specialist for advice.
19
AQUARIUM WATER TEST FOR A HEALTHY AQUARIUM!
