What is this?

ThatPhillyReefer

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Hello All! I have been having this weird algae growing all in my tank. My tank is 4 years old, nitrates are at 8.0 and phos are at .05. I added/plumbed a 50g frag tank to my 90g display about 2 months ago and thats when I stated seeing this stuff. I read alot before adding the frag tank to make sure nothing would happen. It may be a coincidence but it wont go away. I do 1g wc every night and 15-20g every month if needed. Any idea what it is and how I can get rid of it? Its on my corals. It looks like Dinos but not sure

thank you!

pics aren’t the best but its a brown/red ish color. its hard to describe IMG_2309.jpeg

IMG_2307.jpeg IMG_2308.jpeg
 
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Freshwater filter only or is it? Have you ever used an HOB filter on a saltwater tank?

  • I currently use a HOB filter on my reef tank.

    Votes: 50 25.1%
  • I don’t currently use a HOB filter on my reef tank, but I have in the past.

    Votes: 50 25.1%
  • I have used a HOB on fish only or quarantine tanks, but not on the display tank.

    Votes: 47 23.6%
  • I have never used a HOB on a saltwater tank.

    Votes: 48 24.1%
  • Other.

    Votes: 4 2.0%
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