What corals are best for beginners?

Soft corals such as mushrooms, zoanthids and leathers, and hardy LPS like duncans, are the classic starting corals. They tolerate lower light, gentler flow and less-than-perfect chemistry while you learn. SPS corals like acropora are the advanced end and are best left until your tank is mature and stable.

When can I add my first coral?

Once the tank is cycled, mature and your water is stable - not in the first weeks. Corals live or die on stability, so let the tank settle, get your salinity and (for stony corals) alkalinity, calcium and magnesium steady first, then start with an easy soft coral.

Do corals need to be fed?

Many benefit from it, but light is their main energy source. Photosynthesis powers most corals; some LPS take target-fed meaty foods and grow faster for it. You feed the tank sensibly and let light do most of the work - overfeeding just fuels algae.

What water parameters do corals need?

Stable salinity around 35 ppt, and for stony corals, alkalinity around 8 to 11 dKH, calcium 400 to 450 ppm and magnesium 1300 to 1400 ppm, plus low-but-not-zero nitrate and phosphate. Stability matters more than hitting an exact number, especially for alkalinity.

Why is my coral not opening?

Usually light, flow or placement - or instability. A coral getting too much flow or light stays closed; so does one that has just been moved or is reacting to a parameter swing. Check placement and confirm your water is steady before worrying about disease.

Coral Care for Beginners

🐠 The short version: keep corals in the right order — soft corals and easy LPS first, SPS much later. Each wants the correct light, flow and placement, most run mainly on light (some LPS enjoy feeding), and stony corals need stable alkalinity, calcium and magnesium. Above all: corals live or die on stability. Start easy, go slow.

🔧 Place each coral by its sourced light/flow needs with the coral placement guide, and keep the chemistry steady with the parameter chart and dosing calculator.

Start in the right order: soft → LPS → SPS

Corals climb a difficulty ladder, and keeping them in order is the single best way to succeed:

Soft corals — start here. Mushrooms, zoanthids, leathers, GSP. Forgiving of lower light, gentler flow and imperfect chemistry — ideal while you learn. Browse the soft coral hub. (Safety note: zoanthids can carry palytoxin — handle with care; see their care sheets.)
LPS — the next step. Large-polyp stony corals: hammer, torch, frogspawn, duncan, acan. Duncan is a superb beginner LPS — peaceful and feed-loving. LPS start needing stable alkalinity, calcium and magnesium, and they have sweeper tentacles, so give them space. See the LPS hub.
SPS — the advanced end. Small-polyp stony corals: montipora (the gateway), birdsnest, acropora. They demand mature tanks, higher light, strong turbulent flow and rock-steady chemistry. Acropora is the endgame, not a starter. See the SPS hub.

Light, flow and placement

Every coral has a light band, a flow band and a preferred zone (sand, low rock, mid, high). Softies and LPS generally want lower light and gentler flow; SPS want more of both. Put a coral where it fits and acclimate new light slowly — pale/bleached means too much light, brown means too little. The full method is in reef lighting, flow & PAR explained, and the placement guide gives the sourced light, flow and zone for each coral.

Feeding: light does most of the work

Most corals are powered by photosynthesis — light is their main food. Beyond that, many LPS grow faster with occasional target-fed meaty foods (mysis, coral foods), and a sensibly-fed tank gives corals the dissolved nutrients they need. You don’t need to feed every coral directly; feed the tank reasonably and let light carry the rest. Overfeeding just fuels algae.

The chemistry corals need

Soft corals are relatively undemanding, but stony corals (LPS and SPS) build skeleton and need those blocks kept steady:

Salinity ~35 ppt, stable.
Alkalinity 8–11 dKH (SPS often 7–8), calcium 400–450 ppm, magnesium 1300–1400 ppm — kept stable; swings (especially alkalinity) burn tissue.
Nitrate and phosphate low, but not zero — corals feed on them, and zero pales SPS and invites dinos (why).

Water changes cover the demand of a light coral load; as stony corals grow, you dose to hold the numbers. Full detail: reef tank water chemistry explained.

Give corals room (aggression is real)

Corals compete. Euphyllia (hammer/torch/frogspawn) sting with sweeper tentacles — torch is especially aggressive. Some softies (GSP, xenia) spread invasively and are best kept on their own rock, and toadstool leathers wage chemical warfare (allelopathy — run carbon). Leave space between colonies and check each coral’s temperament before you glue it down.

The honest takeaway

Start with an easy soft coral in a mature, stable tank; get its light, flow and placement right; keep your chemistry steady; and only climb toward SPS once you’ve earned it. Corals reward patience and stability more than money.

Sources & further reading

Coralkin — Coral placement, light & flow guide — sourced light/flow/placement per coral.
Coralkin — Parameter chart and Dosing calculator — the chemistry, sourced.
Coralkin — Coral care questions and the soft / LPS / SPS hubs.
Bulk Reef Supply, Tidal Gardens and WetWebMedia — coral husbandry references (per our care sheets).