Green Algae Bloom

[sanchezkk]

I presently own a 20gal tank of 4 Glo-Fish. I have completed several Was to no avail. The tank starts off clear but wait a few hours, it's back to green and cloudy. Please help!

 

[fort384]

What kind of lighting do you have?

What are your water parameters? NH4, NO2, NO3?

Does the tank get any natural sunlight?

How long has the tank been setup?

 

[sanchezkk]

What kind of lighting do you have?

What are your water parameters? NH4, NO2, NO3?

Does the tank get any natural sunlight?

How long has the tank been setup?

I use actinic bulbs.

Parameters are good.

No natural sunlight.

6 months

 

[fort384]

Actinics can cause algae blooms.

What is good for parameters?

 

[sanchezkk]

Ammonia 0.0ppm
Nitrite 0.0ppm
Nitrate 0.0ppm

 

[fort384]

0.0 Nitrate? That doesn't seem right. Unless you have so much algae that it is uptaking all the nitrate.

I would get away from strictly actinic lighting on a FW tank. I would also suggest a 4 or 5 day black out to see if you can get back to a good starting point. That should be enough to end a green water issue. What kind of filtration do you have?

 

[sanchezkk]

Mechanic with gravel carbon