Quick check
- 1Do not start a treatment plan from color alone.
- 2Check whether nutrients are too high, too low, or swinging.
- 3Improve flow and detritus removal before chemical escalation.
- 4Protect corals and oxygen levels during any blackout or treatment.
Start here: For cyano vs dinos, I would identify the cause before buying a cure. Most reef problems get worse when light, nutrients, flow, and treatment all change at once.
Advice for your tank
What pest identification really means
Cyano vs dinos in a reef tank is a system decision, not an isolated fact. ReefCrafter ties the answer back to tank size, livestock pressure, equipment margin, and the failure mode most likely to punish the build.
How to make the decision
Start with the observable result, then check the surrounding inputs. If the plan depends on pest identification, confirm the tank, gear, and routine can support it before buying another product or animal.
- Do not start a treatment plan from color alone.
- Check whether nutrients are too high, too low, or swinging.
- Improve flow and detritus removal before chemical escalation.
- Protect corals and oxygen levels during any blackout or treatment.
When to slow down
Slow down when the fix would hide wrong-treatment escalation. A reef tank usually improves faster when the root cause is removed than when the symptom is forced to disappear.
Cyano vs dinos vs diatoms: field identification
| Clue | Cyanobacteria | Dinoflagellates | Diatoms |
|---|---|---|---|
| Texture | Flat, rubbery mat that peels off in sheets | Snotty strings or loose brown dust, depending on genus | Thin, dusty brown film |
| Bubbles | Small bubbles lift off the mat in light | Ostreopsis traps bubbles in mucus strands; Amphidinium seldom | Usually none |
| Color | Red/burgundy, also green or near-black | Brown to golden | Brown |
| Smell | Earthy or musty | Usually no strong smell | None |
| Microscope (100–400×) | Long thread-like filaments | Distinct oval cells, often spinning or gliding | Glass-walled cells, often boat-shaped |
Compiled from the SteadyReef, ReefDudes and Pod Your Reef identification guides and the BAReefers dinoflagellate ID guide cited below. Visual clues overlap; a microscope sample is the reliable way to confirm.
Compare the gear
Calculate the sizing range
Adjust your tank details, then open the result in the planner.
Light, medium, and heavy targets are 113, 150, and 188 gallons of skimmer rating.
Use two heaters around 95 W each, preferably controller-backed.
The 20-40x band gives 1,500-3,000 GPH before aquascape and pump placement.
That aims to deliver 375-750 GPH after about 50% plumbing loss.
For this goal, use the 150-250 PAR band and cover the full 864 sq in footprint.
Monthly consumables often land around $60-$120 before livestock surprises or upgrades.
The math and worked examples
Decision signal
Example: Do not start a treatment plan from color alone.
This keeps the guide tied to the page topic instead of borrowing unrelated equipment math.
Risk check
Example: Check whether nutrients are too high, too low, or swinging.
This keeps the guide tied to the page topic instead of borrowing unrelated equipment math.
Next constraint
Example: Improve flow and detritus removal before chemical escalation.
This keeps the guide tied to the page topic instead of borrowing unrelated equipment math.
- Risk = misidentification x treatment strength
- Low nutrients plus bright light often changes the dino risk picture
- Flow and export change both cyano mats and detritus buildup
Common mistakes
- Treating pest identification as a one-product problem.
- Ignoring wrong-treatment escalation because the tank looks acceptable today.
- Changing several variables at once and losing the ability to see what helped.
- Using a generic recommendation without checking tank size, livestock, and equipment margin.
Before buying
- The relevant calculator or guide has been checked before purchase.
- The plan fits current livestock and the next realistic livestock step.
- The maintenance routine can support the choice after the first week.
- The product or animal has a clear job in the build.
Common questions
Can the planner replace observation?
No. ReefCrafter catches sizing, compatibility, and planning risk. Daily animal behavior, test trends, and equipment condition still decide whether the tank is actually stable.
Should beginners fix this with a product first?
Usually no. Identify the cause, confirm the measurement, and then decide whether husbandry, stocking pace, or equipment is the right fix.
How do I tell cyano from dinos without a microscope?
Cyano is usually a flat, rubbery red or dark mat with an earthy smell that peels off in sheets. Dinos such as Ostreopsis form snotty, stringy brown growth with bubbles trapped in mucus. Visual ID is a hint, not a confirmation.
Do low nutrients cause dinos?
Identification guides commonly associate dinoflagellate outbreaks with near-zero nitrate and phosphate, while cyano is more often linked to detritus and low-flow zones. Test both before changing nutrients.