Sera GVG Mix size-12-5cm The sera O2-Test monitors the

The sera O2-Test monitors the actual oxygen level in the water within minutes and allows for acting in time

No mess maintenance – Locking features are integrated into the inlet/outlet connection unit to ensure no accidental spillage or messy maintenance

240 V ~ 50/60 Hz

responsible for the nitrification process

while reducing the frequency of media replacement

Sera GVG Mix size-12-5cm The sera O2-Test monitors theThese special flakes contains a large amount of Gammarus shrimps and Spirulina algae. The addition of entire, carefully freeze dried food organisms such as krill, daphnia and bloodworms makes this food particularly attractive. The balanced natural level of minerals and trace elements (iodine and calcium, among others) provides natural protection against many deficiency syndromes.