Proaqua Test JBL O2 Refill ( Ed+Em )

To determine the current oxygen content and as a result indicate whether measures to increase the O2 content need to be taken.
Quick test to monitor the aeration: fill glass vial with sample water, add reagent, read sample value off colour chart.
When to use: once a week in newly set up aquariums and if there are signs of oxygen deficiency.
Clear colour indication from yellow to wine-red.
You will find detailed information and troubleshooting tips about water analysis on the JBL website in Essentials/Aquarium or Pond.
Package contents: 1 quick test.
Contents for approx. 40 measurements.
Incl. 3 reagents, syringe, glass vial with screw cap and colour chart.
Reagent refill separately available