Cyano usually means imbalance + dead spots
Cyanobacteria often shows up as red/burgundy slime on sand and rock. It’s common in newer reefs and in tanks with low flow areas, excess nutrients, or inconsistent maintenance.
Common triggers
- Dead spots with low flow
- Detritus buildup
- Nutrient swings (yo-yo feeding/export)
- Old/dirty mechanical filtration
Safe, stability-first steps
- Increase flow over affected areas
- Siphon cyano during water changes
- Clean mechanical media more often
- Test nitrate/phosphate weekly and adjust slowly
Flow + filtration support
Cyano hates strong, consistent movement and clean export routines.
Browse: Aquarium Filters, Pumps & Media.
Support products
Conditioners and bacterial products can help stabilize after cleanups and reduce “mini-cycle” risk.
Browse: Aquarium Chems, Bacters & Cultures.
CTA
Want cyano gone for good? Fix flow, export, and consistency first: Shop Reef Tank Supplies.
