red, non stringy, tough to remove algae

jacksin

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what is this and how do I get rid off it? Its growing on rock and walls over the top of coraline. It does not blow off when using a powerhead.
I add neophos and nitrate 2-3 times a week to maintain phos .02-.04 and nitrate around 5. Don't want to stop these additions as I don't want these parameters to bottom out
thanks
IMG_4668.jpeg
 

Tired

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Are you sure it isn't just that the coraline is turning red for some reason? Is it present anywhere other than on the coraline?
 
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jacksin

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It’s starting to choke off a green stylo coral. It started growing from the base up. The base of the coral was bare skeleton, so it started to grow there
 

Greg P

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Have you tried to scrub it with a stiff brush? Not a toothbrush but rather something wire ... preferably stainless.
What does a brush do to it?
 
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jacksin

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IMG_4675.jpeg
Sorry for the delay in response. Sleep and work always get in the way of the important work to be done.
Seems to brush off with a toothbrush. Kinda hard to see in the pic. This is the coral that is being chocked off from the bottom up.
IMG_4674.jpeg
 

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