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  #1  
Old 02-03-2020, 10:47 PM
djbrandriff150 djbrandriff150 目前離線
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Join Date: Nov 2018
Location: Ambler
Posts: 8
Default Purple gooo

What is this purpley stuff on my rocks in a few spots


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  #2  
Old 02-03-2020, 11:19 PM
jacky jacky 目前離線
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Join Date: May 2018
Location: Asia
Posts: 2,411
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Hello djbrandriff150, red signs on sand and rocks that look like cyano. When changing the water, siphon the affected area under vacuum.

Is the system a Zeo system? Try CoralSnow 2ml + ZeoBac 1 drop mixture for 7 ~ 10 days. After the administration, temporarily turn off the skimmer for 2hr and adjust the humidity.

Toothbrush is also your good helper, the material accumulated on the rocks for cleaning

Reduce feeding, I don't know whether to give iodine dose, it is good to stop adding temporarily.
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  #3  
Old 02-04-2020, 03:57 AM
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G.Alexander G.Alexander 目前離線
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Can you please post a closer picture of it ?

G.Alexander
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  #4  
Old 02-08-2020, 03:52 PM
TravelingPotato TravelingPotato 目前離線
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Looks like cyno. The things jacky mentioned will help. Cyno is usually from overfeeding and/or lack of flow in that area so consider that for a long term solution.
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