Algae really just on one Rock

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jonleeroyix

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So I have some thick hairy algae in my tank but it’s on only one rock, and little bit on another small rock at the bottom but is there any reason it would appear mostly only on this rock?

27C57F29-9822-494C-A821-14B52D1FBCA7.jpeg 3D9B16ED-DE9E-4897-AC8A-E09470E8A02F.jpeg
 
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Dan_P

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So I have some thick hairy algae in my tank but it’s on only one rock, and little bit on another small rock at the bottom but is there any reason it would appear mostly only on this rock?

27C57F29-9822-494C-A821-14B52D1FBCA7.jpeg 3D9B16ED-DE9E-4897-AC8A-E09470E8A02F.jpeg
Conditions are good in those spots or it is just starting to grow there and will spread to other rocks over time.
 
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