Montipora Care Guide: Plating and Encrusting Montis
The short answer: Montipora are intermediate small-polyp stony (SPS) corals that grow as plates, encrusting sheets or branches. They do best under moderate to high light (about PAR 180–320) with moderate to strong flow, on mid to upper rockwork with room to spread. They are mostly photosynthetic, so steady light and stable water chemistry matter far more than feeding. Many reefers keep Montipora as their first SPS before moving on to Acropora.
Quick facts
| Quick facts | Montipora |
|---|---|
| Care level | Intermediate |
| Lighting | Moderate to High |
| PAR guidance | PAR 180–320 |
| Flow | Moderate to Strong |
| Placement | Mid to upper rockwork with room to plate or encrust |
| Behavior | Plating, branching, or encrusting growth can shade and overtake nearby surfaces. |
| Compatibility | Allow room for plating or encrusting growth so it does not shade neighboring corals. |
| Feeding | Mostly photosynthetic |
What are Montipora?
Montipora is a large genus of SPS corals with tiny polyps and a porous skeleton. Reefers usually sort them by growth form:
- Plating Montipora, including the "monti cap" (usually sold as Montipora capricornis), grow thin, overlapping plates or whorls.
- Encrusting Montipora spread as a sheet over rock and can later lift into plates or bumps.
- Branching Montipora, such as the "digi" (usually sold as Montipora digitata), grow finger-like upright branches.
- Grafted Montipora are two or more different Montipora grown together on one piece, so each part keeps its own look.
All of these share the same basic needs. The growth form mainly changes how much space the coral needs and which direction it will grow.
Light and placement
The recommended range is PAR 180–320 on mid to upper rockwork. Start a new frag at the lower end of that range, on the middle of the rockwork, and move it up over a couple of weeks if it looks healthy, with polyps extended and tissue intact. Moving a frag straight into strong light is a common cause of paling or bleaching, even when the light is within the coral's range.
Plan the final spot before gluing. Plating Montipora spread outward and can shade whatever is beneath them, so put them where a growing plate will not cover other corals. Encrusting types will cover the rock around them, and branching digitata grows into a bush that needs open space above and around it.
Flow
Montipora want moderate to strong flow. Good flow keeps detritus from settling on plates and in the crevices of encrusting colonies, and it carries food and oxygen across the tissue. Random or alternating flow is usually better than one steady jet. The undersides of plates often get little water movement; if you see detritus or algae collecting there, add flow to that area rather than moving the coral into a direct blast.
Feeding
Montipora are mostly photosynthetic and get most of their energy from the algae living in their tissue. They do not need target feeding. Regular feeding of the fish provides the small amount of dissolved and particulate nutrients these corals use. What matters more is keeping nitrate and phosphate low but not at zero; corals kept in water stripped of nutrients often pale and grow slowly.
Water parameters
Use general reef ranges and hold them steady. Stability matters more than a perfect number, and SPS corals react to alkalinity swings faster than most LPS or soft corals.
- Temperature: about 76–80°F
- Salinity: about 1.025–1.026 SG
- Alkalinity: about 7–11 dKH, kept steady
- Calcium: about 400–450 ppm
- Magnesium: about 1250–1400 ppm
- Nitrate and phosphate: low but not zero
Growing SPS colonies use alkalinity and calcium steadily, so test regularly and dose or use a calcium reactor as needed to keep them stable.
Neighbors and spacing
Montipora have little chemical or stinging defense. Their main way of competing is to grow over or shade other corals. Keep them out of reach of sweeper tentacles from corals such as Galaxea, Euphyllia or Hydnophora, which can kill Montipora tissue on contact. Leave space for the edge of a plate or encrusting sheet to grow without touching a neighbor, and trim Montipora back when they start shading corals below them.
Common problems
- Tissue peeling from the base or edges. The usual cause is an alkalinity or temperature swing, or a pest. Reefers check their test results for recent changes, keep parameters steady, and inspect the coral, especially the underside, for nudibranchs or eggs.
- Pale or bleached tissue after placement. The usual cause is moving the coral into strong light too fast, or a temperature spike. Reefers move the coral lower and acclimate it more slowly.
- Small spreading bite marks, with white spiral egg masses under the plates. This is the classic sign of Montipora-eating nudibranchs. Reefers remove the coral, dip it to knock off the adults, and scrape off every egg mass or cut away the bare skeleton the eggs are laid on. Coral dips kill adults but do not reliably kill the eggs, so reefers repeat the dip and inspection over the next few weeks to catch newly hatched nudibranchs.
- Detritus or algae on plates. The usual cause is too little flow in that spot. Reefers increase or redirect the flow.
- Slow growth. The usual cause is unstable alkalinity, low alkalinity or calcium, or nutrients that are too low. Reefers test, correct slowly, and hold steady.
Dipping new frags in a coral dip before they go into the display is standard practice for keeping pests out.
How our listings work
TIA listings for these corals come in two kinds:
- Stock: The photo is a stock reference image; yours will be very similar.
- Cut to order: You receive a fresh-cut frag of about 1–2 inches from the colony shown; it will be very similar. Fresh-cut frags need at least 2 weeks to heal before they ship.
See the Help Center for shipping and arrival details.
FAQ
Are Montipora good for beginners?
They are rated intermediate. Many reefers start SPS with Montipora because they are usually more forgiving than Acropora, but they still need moderate to high light, good flow and stable alkalinity.
How much light does Montipora need?
The recommended range is PAR 180–320, with moderate to high lighting. Start a new frag at the lower end and move it up gradually.
Do I need to feed Montipora?
No. They are mostly photosynthetic. Feeding the fish normally and keeping nitrate and phosphate low but not zero is usually enough.
Why is my monti cap growing sideways?
Plating Montipora naturally grow outward in plates. Give the plate room to spread so it does not shade corals below it.
What eats Montipora?
The best-known pest is the Montipora-eating nudibranch, which leaves bite marks and white spiral egg masses. Dipping new frags removes the adults, but dips do not reliably kill the eggs, so also check the undersides of plates and the frag plug for egg masses.