How to control zooxanthellae in the reef aquarium

gpwdr

Well-Known Member
View Badges
Joined
Oct 6, 2014
Messages
833
Reaction score
380
Location
Enfield, Connecticut
Zooxanthellae enter the host animal through the water column. Corals can adjust the algae population on a daily basis by releasing or by taking up algae as needed.

Elevated nitrate can excessively spur the growth of zooxanthellae, which in turn can actually decrease the growth rate of the host coral.

So, my question is how to reduce zooxanthellae in corals to produce lighter colors?

Do you increase coral food to reduce the zooxanthellae?

What would be the best type of coral food to use?

Maybe the question is how to increase the zooxanthellae to produce brown corals?
 
World Wide Corals - Quality Aqua-cultured Coral

Bao

Member
View Badges
Joined
Aug 24, 2012
Messages
77
Reaction score
27
Location
Boston, MA
Nitrate and Phosphate go up will help zooxanthellae to reproduce more in the corals which cause the corals to have that brown color.
If you want to reduce the amount of zooxanthellae, then reduce nitrate and phosphate. Zeovit also has a product called Zeospur that help to reduce the amount of zooxanthellae as well. Obviously, there are more to this than just nitrate and phosphate. If you bring the corals up high enough, it will bleach out and reduce the amount of zooxanthellae as well. But certainly this isn't a healthy way of doing it.
 

twilliard

Winter break! well on my way to being an I.T. PRO
View Badges
Joined
Jun 3, 2015
Messages
10,280
Reaction score
9,085
Location
Ellensburg, Washington
My po4 is .014
No3 is 2ppm
I have found I can control the colors of some but not others with the amount of no3 in the water.
 

Nowell

Active Member
View Badges
Joined
Aug 22, 2014
Messages
179
Reaction score
284
Location
USA
Zooxanthellae enter the host animal through the water column. Corals can adjust the algae population on a daily basis by releasing or by taking up algae as needed.

Elevated nitrate can excessively spur the growth of zooxanthellae, which in turn can actually decrease the growth rate of the host coral.

So, my question is how to reduce zooxanthellae in corals to produce lighter colors?

Do you increase coral food to reduce the zooxanthellae?

What would be the best type of coral food to use?

Maybe the question is how to increase the zooxanthellae to produce brown corals?
Zooxanthellae are dinoflagellates (protozoans) and not algae. When I first studied coral reef ecology, they were thought to be algae. This has subsequently been proven false.
 
Best reef aquarium LED lighting
OP
gpwdr

gpwdr

Well-Known Member
View Badges
Joined
Oct 6, 2014
Messages
833
Reaction score
380
Location
Enfield, Connecticut
Good information Nowell, what do the corals consume without the protozoans, to get lighter colored corals rather than browner colored corals.

My No3 is oo.o ppm Red Sea test kit

Phosphorus is 00.0 ppb Hanna

Phosphate is 00.0 ppm Hanna


Last week I shut off the protein skimmer for two days per week, thinking the corals can take more food from the water instead of taking food from a lot of zooxanthellae?

Any suggestions?

Gene
 

Russ265

Valuable Member
View Badges
Joined
Jul 28, 2015
Messages
2,752
Reaction score
1,892
Good information Nowell, what do the corals consume without the protozoans, to get lighter colored corals rather than browner colored corals.

My No3 is oo.o ppm Red Sea test kit

Phosphorus is 00.0 ppb Hanna

Phosphate is 00.0 ppm Hanna


Last week I shut off the protein skimmer for two days per week, thinking the corals can take more food from the water instead of taking food from a lot of zooxanthellae?

Any suggestions?

Gene
0 no3....
what resolution/test kit?

if corals are starved of no3/po4 they will pale out, brown, then die.
usually the greens will turn violet and the violets turn brown.

a tell tale sign is that when actinics are on, your greens dont pop.
 

Is it HARD or EASY for you to keep your corals colorful? (check all that apply)

  • SPS Hard

    Votes: 26 57.8%
  • SPS Easy

    Votes: 12 26.7%
  • LPS Hard

    Votes: 10 22.2%
  • LPS Easy

    Votes: 32 71.1%
  • Zoas Hard

    Votes: 2 4.4%
  • Zoas Easy

    Votes: 34 75.6%
  • Soft Corals Hard

    Votes: 2 4.4%
  • Soft Corals Easy

    Votes: 39 86.7%

Online statistics

Members online
2,370
Guests online
7,478
Total visitors
9,848
Battlecorals
Pieces of the Ocean
Top