Dennerle Profi-Line CO2 Long-Term Test Correct - Refill Pack 5 Ampullas Special-
With the Long-Term Test Correct you can measure the CO2 content of your aquarium over the span of 1 month. The CO2 Special Indicator responds to the CO2 content by changing color blue = too little CO2 green = ideal CO2 level yellow = too much CO2 The leve
