- 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?
Using a solution of 5-10% bleach, dip the plants for a few minutes as needed to destroy the algae. Make sure they are thoroughly rinsed because bleach can kill your fish. Invest in a filter. Remember, if algae persist through regular water changes, you have to do more to combat the problem.
Is green water harmful to fish?
Green aquarium water is not considered dangerous to fish. In fact, many fish happily live in green-colored water in their natural environment. The same goes for plants. While the algae that makes up green aquarium water feeds on many of the same nutrients that your plants do, it shouldn’t cause any direct harm.