Free Next Day Delivery

Free next day delivery on orders over €150

Learn More


Step by step
guide to
purchasing online.

Learn More


We go the
extra mile
...see how.

Learn More

Acclimation Guide

How to introduce new fish to your tank.

Learn More

Premium Selection

Odd balls and
unique livestock.

Learn More

JBL O2 Oxygen Test-Set

Your Price: €13.99



In Stock


Oxygen test
• Recommended oxygen content: 8 mg/ at 25° C.
• Test providing accurate readings of oxygen levels from 1 - 10 mg/L in freshwater and marine tanks as well as garden ponds.
• Important when algae preparations are used, as large amounts of oxygen are used when algae are eliminated.
• Recommended for use at night in densely planted aquariums, when large amounts of O2 are absorbed.
Product description
The JBL Oxygen Test Set O2 is designed for the measurement and routine control of the oxygen content in saltwater and freshwater aquariums and in mains water and garden ponds within the range of 1 – 10 mg/l (ppm).
Why test?
Oxygen is the “elixir of life” for all organisms in the aquarium. Fish, slugs, corals, bivalves etc. need oxygen to breathe. But also the “invisible helpers” in the aquarium and pond, the pollutant-destroying bacteria, depend on sufficient supplies of oxygen in order to be able to carry out their useful activities. Just as on our earth, the supply of oxygen in the aquarium and pond is guaranteed by the assimilation activities of plant organisms (algae and higher plants). Oxygen supply can only be maintained by water movement and/or aerating with the appropriate technical equipment (from specialist pet suppliers) in those aquariums and ponds where sufficient oxygen cannot be supplied by plants, such as marine aquariums or aquariums stocked with plant-eating fish etc.
The following levels are recommended: Towards the end of the lighting period in freshwater aquariums with plants, the oxygen level from the activities of the plants, (without technical assistance e.g. aeration, but supported by moderate water movement), should correspond at least to the equilibrium level appropriate for that particular temperature. At 25 °C the recommended level is approx. 8 mg/l. The levels for other temperatures are given in the following table.

°C 4 6 8 10 11 12 13 14 15 16 17 18 19
mg/l O2 12,7 12,1 11,5 10,9 10,7 10,4 10,2 10 9,8 9,56 9,37 9,18 9
°C 20 21 22 23 24 25 26 27 28 29 30 31 32
mg/l O2 8,84 8,68 8,53 8,38 8,25 8,11 7,99 7,86 7,75 7,64 7

Customer Reviews

This product has not yet been reviewed.

Write a Review

Please login or register to write a review for this product.

Loyalty Points

Shop and earn
free livestock.

Learn More


See what
mix together.

Learn More

Contact Us


Tel. 01 459 5650
View our locations & Map


Tel. 091 764 563
View our locations & Map


Learn More

Arrive Alive

48 hours Guarantee - If your fish, coral, plant, or invertebrate doesn't arrive alive and stay alive for 48 hours, we'll credit your account or refund your money.

Learn More

Terms & Conditions   |   Privacy Policy   |   Site index   |   © 2012