Green Coralline Algae??

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Hi guys! I'm recently new to this hobby and I currently own a Red Sea Reefer Nano. I started cycling my tank just over two weeks ago and all seems to be going well! I noticed that over this past week dark green areas have been appearing on rock, especially one part in particular. Some further advice as to what this is would be great! Thanks.

HK_Fuey

  • Graeme
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Reply #1

Either the beginnings of green hair algae (gha) or maybe green cyano bacteria  :damn:  What are your nitrate and phosphate test results?

Jordan_C

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Reply #2

Oh no!! 😩 My nitrates tend to be quite high as I'm part way through the cycle! Maybe 5-10ppm! But I haven't tested for phosphates as I don't have any equipment to test this (never thought I'd need to at this stage).

HK_Fuey

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Reply #3

Don't worry.  You can do a water change now, and it won't affect the cycle.  The bacteria is on the sand, and rock surfaces, not in the water column.  10ppm isn't high though, so no rush.  As the tank stabilises, you'll probably get other algae outbreaks, and each will burn out as it uses up available nutrients, and other things start to eat it, or out compete it.

Jordan_C

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Reply #4

Okay thank you! So at this point in time I don't need to worry about the algae on the rock attached in the pictures? It's just very different to the other algae being produced on the rocks within the tank. I use RO/DI water, with dry rock and used shrimp to start the ammonia production.

HK_Fuey

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Reply #5

I'd leave it for now, and just make sure it doesn't start growing all over the place.  Some snails or hermits will take care of a small amount of algae when you add them.

How's the cycle going?

Thanks:


Jordan_C

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Reply #6

Okay will do! I feel like it's going well, I have diatoms forming on the glass and sand bed now, ammonia has dropped close to zero, nitrites and reading higher than nitrates, but just waiting for nitrites to drop now!

HK_Fuey

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Reply #7

Sounds good.  Just what you'd expect  :glad:

Thanks:


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