my tank became muddy ...greenwater?

a-hua

Subscriber
Aug 5, 2007
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my tank became muddy for 3 weeks.
sometimes it was a little clear (maybe when the light start),
and sometimes was muddier (before the light close,).
is it greenwater ? i think they are something different...
how can i get rid of it?

http://img136.imageshack.us/img136/2655/ahuavm8.jpg

ps. there are green dust algae, blue green algae, and diatom in my tank.

a-hua
 

VaughnH

Lifetime Charter Member
Lifetime Member
Jan 24, 2005
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Sacramento, CA
It looks like green water. What is the tank size, lighting, fertilizing method, CO2? Those are major clues as to what is the problem.
 

a-hua

Subscriber
Aug 5, 2007
42
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6
My Tank...
60*35*65 Cm
Pl36w*1+fl20w*1
1/5 Kno3+1/10 Kh2so4 Everyday
1 Bubble/sec ...co2

I Am Sure It Is Greenwater Because It Become All Green Now..haha(but It Take More Time Than Before To Become Green)

I Got A Uv-c Light(15w, 500 L/hr Powerhead) And Used One Day ...anything Should I Notice?
 
E

evandro.carrenho

Guest
I had a similar issue and needed 3 days of an 8w UV turned on. After that I performed a water changed of about 70%.

I believe that the green water started because of mistakes in my maintenance routine. Once I have some matter returned from the filter piping to the water column, that triggered first a opaque appearence in the water, and after a few days it turned green. I tried several methods, like blackout and frequent water changes, but they (or me) were all cumbersome.

UV was the way to solve it. I had some other events of green water but that was all related to the maintenance routines (turned UV on again).

I scrap my glass before removing water from the tank, and siphon water after having it clean. This brings out all the dirty removed form the glass. I also avoid disturbing the substrate too much, espeacially when removing dead plants. In the past I used to uproot them, now I just cut them near the substrate and leave the roots there to rotten, they serve as food for other plants.

I always noticed that plants suffer when UV is turned on for a long period. Speacially of chlorosis (white leaves). This seems to be due to lack of iron... I always get zero reading of iron when UV is turned on.

Regards,
Evandro