Coralline doesn’t like top of the tank?

Miami Reef

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I finally let the coralline grow out. It doesn’t seem to like the top of the tank.

Does anyone else experience this in their tanks? It’s a perfect border. There has to be an explanation for this.

IMG_8793.jpeg
 

Pistondog

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My guess is no light. If coraline gets exposed to air it turns bright flourescent pink.
 

Dburr1014

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Coraline doesn't like bright light, or I should say, prefers dimmer light. But not zero light.
That looks like it is not getting any light. But I don't think that's the case because of the end of the tank are the same.
 
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Miami Reef

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I don’t take longer than 15-20 minutes to drain and refill. The water drops below the “dead zone” border.

I use a blanket of T5 lighting that completely covers the entire tank top. I can’t imagine there being too little light. I was thinking it was too much if anything.


I’m leaning toward the air + direct light exposure. I won’t change water for a month to see if the coralline will grow in the no-man-zone.

If the coralline starts to fill that area out, then its probably the air exposure.

It’s been one week since my last water change, so 3 more weeks to go!
 

Lavey29

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I don’t take longer than 15-20 minutes to drain and refill. The water drops below the “dead zone” border. Perhaps the air exposure time reaches for the upper section during the water change?

I use a blanket of T5 lighting. I can’t imagine there being too little light. I was thinking it was too much if anything.


I’m leaning toward the air + direct light exposure. I’m going to not do a water change for a month to see if the coralline will grow in the no-man-zone.

If the coralline starts to fill that area out, then its probably the air exposure.

It’s been one week since my last water change, so 3 more weeks to go!
I have a distinct no coralline line around my tank where the water change levels out. In between water changes it fills in a little.
 

dadnjesse

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I don’t take longer than 15-20 minutes to drain and refill. The water drops below the “dead zone” border.

I use a blanket of T5 lighting that completely covers the entire tank top. I can’t imagine there being too little light. I was thinking it was too much if anything.


I’m leaning toward the air + direct light exposure. I won’t change water for a month to see if the coralline will grow in the no-man-zone.

If the coralline starts to fill that area out, then its probably the air exposure.

It’s been one week since my last water change, so 3 more weeks to go!
My tank does the same thing. I get Coralline at the top but when I do I water change It turns white from the water level change. In my experience it dies pretty fast out of the water.
 
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Miami Reef

Miami Reef

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I hate scraping the back wall. Imagine just draining the tank for 15 minutes and then having a squeaky-clean back wall. :thinking-face:
 

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