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Red Slime Algae - What is it and How to Get Rid of it

Red Slime Algae - What is it and How to Get Rid of it

If you have a Saltwater Aquarium, no doubt you have seen Red Slime Algae (Cyanobacteria). You need to jump on it promptly to prevent it getting worse, plus address the water quality issues that causes it in the first.

Red Slime (Cyanobacteria)

Description:  Fine filaments that form encrusting tissue-paper-like growths on rock, sand, gravel, and corals.


  • Elevated nutrient levels
  • Poor circulation
  • Lighting

Solutions:   Siphon surface.  Increase circulation by adding powerheads to system to prevent any dead flow spots. Use only actinic spectrum lighting for 24-48 hours to decrease growth. Elevate alkalinity to 105-125 mg/L.  Chemicals: Boyd’s Chemiclean Red Slime Remover.  Medications will help get rid of cyanobacteria quickly, but you should still address the reasons it occurred and follow long-term solutions.



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