green glass algae

Giag

Junior Poster
Jan 24, 2009
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Greece
hello

is green spot algae a sign of phosphorus defficiency?

I use estimative Index and the plants are growing wonderful !!

however every three- four days on the surface of my glass hard green algae starts to fill in....

i have 48 watts over a 65 liter aquarium my CO2 is constant during light period.. The plants are doing great i was just wondering about the green algae on the glass...
 

VaughnH

Lifetime Charter Member
Lifetime Member
Jan 24, 2005
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Sacramento, CA
I have been using double the EI recommended PO4 dosage for some time now, and it does seem to at least greatly limit the amount of GSA I see. At the moment I have almost none. I don't know if that means GSA is a result of having too little PO4, or just that having more is hard on GSA.
 

Gerryd

Plant Guru Team
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Sep 23, 2007
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Hi,

It has been my experience that both low P and/or low/poor c02 can cause this algae.

I have had some small outbreaks that I was able to eliminate simply by adding more P, but recently had issues with c02 and that brought on a bigger and more prolonged attack... EI was fine, but not until c02 was fixed that it disappeared quickly. EI was not changed, just c02....

Don't forget to trim/eliminate any infested areas. No sense in them hanging around. New growth will replace it if all is well.

I have relatively high light (range 50-200 micromoles from bottom to top) and have very little glass or other algae as long as my c02 is good.

When the c02 suffers, algae quickly follows, and is usually gone with the restoration of the c02.

Hope this helps.
 

Henry Hatch

Guru Class Expert
Aug 31, 2006
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Gerryd;36539 said:
Hi,

It has been my experience that both low P and/or low/poor c02 can cause this algae.

I have had some small outbreaks that I was able to eliminate simply by adding more P, but recently had issues with c02 and that brought on a bigger and more prolonged attack... EI was fine, but not until c02 was fixed that it disappeared quickly. EI was not changed, just c02....

Don't forget to trim/eliminate any infested areas. No sense in them hanging around. New growth will replace it if all is well.

I have relatively high light (range 50-200 micromoles from bottom to top) and have very little glass or other algae as long as my c02 is good.

When the c02 suffers, algae quickly follows, and is usually gone with the restoration of the c02.

Hope this helps.

I have had a problem with gsa on an anubia. I recently started misting and increased my EI dosing. The algae is slowly receding and new growth so far looks clean.