Yet another "Is it Cyano?" post!

obanarama

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We're having a bit of what we think is an Cyano outbreak in our office 75 gallon tank, which is 10 months old. Corals are doing great, fish are happy. And I refer to "we" since its an office tank that we're all working on and loving.

Also know that we’re currently having trouble keeping our Phosphates and Nitrate numbers up, so we’re doing less water changes and feeding more, which seems to have increased our the general algae growth in our tank, as well as increasing this red Cyano looking stuff. We're also considering dosing Ammonia + Urea to get our Nitrates up.

Alk: 8.8
Cal: 450
Mag: 1450
PH: 8.0
Phos: 0.02
Nitrate: 0.8

Temp: 79.8
Salinity: 1.026

All tests were done with either Hanna checkers or Red Sea Coral Pro test kits.

After much research it sounds to me that whether it's Cyano or Dinos the common theme seems to be that we should be siphoning this stuff daily, dosing Phosphate and increasing nitrates. And if that doesn't work after some period of time, hit the tank with Chemiclean as a bit of a last resort. Is this correct?

Let me know if you think its Red Cyano or something else. In real life, without the camera filter, this stuff is more red than appears in the photos.

PXL_20250908_164242163.jpg
PXL_20250908_164305966.jpg
PXL_20250908_164317281.jpeg


Live tank camera video here:

Thank you!

~ Oban Screenshot 2025-09-04 at 4.12.18 PM.png
 

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