Red algae

[wowdude11]

Hey everyone ,
My tank had ich and I took all the fish out. Since then I noticed a red algae has grown on my rocks. Everything is running like it normally wood and I haven’t done a water change in about 2 weeks only difference. Any advice on what it is

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[BgFish]

Does it easily brush off? Kind of looks like
Cyanos.

 

[Letsgotothezoo]

Chemiclean will clean those up.

 

[Not an IT guy]

Looks like cyano. Dealing with it right now myself. You can use chemi as suggested but since it’s empty you can do the dr Tim’s refresh waste way treatment.

 

[wowdude11]

Ya it came off super easy.


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[wowdude11]

What would cause the cyano. I have plenty of flow and since no fish only snails and hermit crabs no over feeding


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[BST310]

What would cause the cyano. I have plenty of flow and since no fish only snails and hermit crabs no over feeding


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The Cyano was likely caused by the drop in nutrients from there being no fish. Have you tested nitrate and phosphate?