Need Help - What Is Green Water Options

[goldfish82]

halo to all lao jiao members here. i am a sin jiao in keeping goldfish. i saw some posting stating green water. can anyone tell me what is green water??
thanks.

[cktan]

yes, 150W onto 40 L of water looks too much. But the light is shine more to the right side of the tub and not at the center. I have also started using a cover to mask off some light. The 150W MH bulb (Osram delux white) is a <4000K lum. I hv a 10,000K lum but felt its really too bright and the goldfish didnt really like it.

I do have a 3ft tub set aside in my store room and will intend to use it when the goldfish grow bigger.

As for test kits, im using Aquarium Pharmaceticals brand. Not as accurate as tetra but i think still quite alright. I dont doubt the test kit results as the "color" of the nitrite gets darker each day and the test kits are new.

Happy Budda, did u ever test yr green water for nitrite say 3-4 days later after a water change? I believe small amt of BB still exist in green water in a suspended state and that explains the presence of nitrite?

[HappyBuddha]

As for test kits, im using Aquarium Pharmaceticals brand. Not as accurate as tetra but i think still quite alright. I dont doubt the test kit results as the "color" of the nitrite gets darker each day and the test kits are new.

I can't offer any explanation on your finding. I think other bros may understand it better and tell you... but as far as I know, nitrite is produced by nitrosomanas bacteria, their presence of which takes weeks to cultivate. Assuming you started off cultivating your green water from scratch, ie, you didn't use some old water from your bio-filtered tank, then there shouldn't be any nitrosomanas bacteria. Without them... where did your nitrites come from? 0.5ppm is not a small amount (that can normally be in our tap water.) I still think you can't use single colour kit to test tinted water.

Happy Budda, did u ever test yr green water for nitrite say 3-4 days later after a water change? I believe small amt of BB still exist in green water in a suspended state and that explains the presence of nitrite?

I have not done that on my green water but did recorded the results of my bio-green water, which don't apply here..