- Test water for high nitrate levels and treat accordingly.
- Treat with Green Away to remove the suspended algae.
- Check for signs of deoxygenation (i.e. fish gasping) and add aeration if necessary.
- Clean filter and check for blockages.
- Check that the discolouration isn’t just on the inside of the glass.
How do you fix green algae in a fish tank?
To get rid of green water, you can blackout the tank for at least a week, which is hard on your plants. Another option is to purchase a UV sterilizer, which will kill off the algae within two to three days.
Is green water harmful to fish?
While green water certainly looks terrible, it is not harmful to your fish. Thousands of single celled algae particles are floating through the fish tank. When the concentration is high enough, your fish can be hardly visible.
What kills green water?
As water flows through this device, it is exposed to UV light. This UV light kills any microscopic organisms that are floating in the water, such as bacterial blooms and phytoplankton. In just a few days, the phytoplankton responsible for your green aquarium water will start to die off.