Fissidens fontanus — 3×3 Mat
Feathery Phoenix Moss arranged as a lush, ready-to-use 3×3-inch mat.
Fissidens fontanus develops elegant feather-like fronds and a naturally layered appearance. The mat can be placed directly or divided across several stones for a mature aquascape effect.
Photo: Foto: Njmeyer03 / Wikimedia Commons · CC BY-SA 4.0
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What it needs to thrive
- Lighting
- Low to moderate light.
- Flow
- Gentle, clean flow prevents debris buildup.
- Feeding
- Light water-column fertilization; CO₂ is optional but improves density.
- Temperament
- Peaceful, shrimp-safe, and suitable for planted community aquariums.
- Difficulty
- Intermediate
- Ideal Tank Size
- 10 gallons and up
- Water Parameters
- 70–80°F · pH 6.0–7.5 · soft to moderately hard water · 0 ammonia / 0 nitrite
Use in the foreground, on mesh, or secured to shaded hardscape.
Quarantine, dip, and acclimation
Quarantine
Hold all new fish in a bare-bottom 10–20 gallon QT for a minimum of 4 weeks. Observe for flashing, clamped fins, white spots, or breathing changes. Treat preventatively with copper (1.75–2.5 ppm chelated) or tank-transfer method for ich, plus a praziquantel course for flukes. Invertebrates and corals skip QT but go through dip and observation instead.
Recommended coral dip
For every new coral: a 5–10 minute bath in your reef-safe dip of choice (Bayer Complete, CoralRx, or Reef Primer) following label dosage, followed by two clean saltwater rinses. Inspect plugs and bases for flatworms, pyramid snails, and eggs — remove or refrag onto clean plugs before placing in display.
Acclimation
Float sealed bags in your QT or display for 15 minutes to match temperature. Then drip acclimate at 2–4 drops per second for 45–60 minutes until volume has tripled. Net livestock into the tank — never pour shipping water in. Dim the lights for the first 24 hours to reduce stress.





