Beginner's Guide to Soft Coral Care

Soft Coral Care Guide for Beginners | Easy-to-Keep Species and Basic Care

Many people interested in keeping corals hesitate due to concerns that it's "complicated" or "equipment is expensive." For such beginners, soft corals are the perfect recommendation. Compared to LPS (large polyp stony corals) and SPS (small polyp stony corals), they are hardy and can be kept with relatively modest equipment, making them beloved as a gateway species for reef tanks worldwide.

What Are Soft Corals?

Corals are broadly classified into "hard corals" and "soft corals." Hard corals have a skeleton made of calcium carbonate, while soft corals lack a skeleton and are characterized by their flexible bodies.

Soft corals have the following advantages over hard corals:

• High tolerance to water parameter fluctuations
• Many species can thrive under lower lighting conditions
• Flow requirements are relatively moderate
• Many species are reasonably priced

However, difficulty levels vary among soft corals, so species selection is important.

Beginner-Friendly Soft Corals

Star Polyps One of the hardiest soft corals. They spread across rock surfaces and form beautiful carpet-like colonies of tiny green or purple polyps. Light, flow, and water quality demands are minimal—they can grow with minimal intervention. However, due to their rapid growth and potential to encroach on neighboring corals, it's best to isolate them.

Cauliflower Corals Named for their resemblance to a rooster's comb, these corals come in several varieties such as branching and bushy forms with abundant color variations. They thrive with moderate flow and lighting. When polyps are extended, they display a graceful appearance and make a striking focal point in the aquarium.

Mushroom Corals As their name suggests, these soft corals have a mushroom-like appearance. They are hardy, grow quickly, and readily propagate through budding. They come in white, green, brown, and other colors. They dislike strong flow, so provide gentle water movement.

Disc Corals (Discosoma) These disc-shaped corals are prized for their vibrant colors. They are sometimes classified alongside zoanthids as polyp-type corals. They tolerate low light well and can be placed in shaded areas of the tank.

Zoanthids (Zoas) Small button-like polyps that form dense colonies. They come in an incredibly wide range of colors and are popular with collectors. They thrive under low to moderate lighting and flow. Rare color morphs command high prices, while standard varieties are affordable.

Husbandry Basics: Water Quality Management

To keep soft corals healthy, maintain the following water parameters:

Salinity (Specific Gravity): 1.025–1.026 (same as natural seawater) Temperature: 24–26°C (chiller required in summer months) pH: 8.1–8.3 Ammonia & Nitrite: 0 ppm (undetectable) Nitrate: ≤20 ppm (ideally ≤10 ppm) Alkalinity (KH): 8–12 dKH Calcium: 380–450 ppm

While soft corals are less demanding than hard corals, ammonia and nitrite must always be maintained at zero. Perform weekly water changes of 10–20% of the tank volume.

Husbandry Basics: Lighting

Most soft corals thrive under moderate lighting. A PAR value of 50–200 is sufficient for the majority of species.

LED lighting is energy-efficient, generates less heat, and is ideal for marine fish and coral keeping. T5 fluorescent tubes are also excellent but are being replaced by LEDs. Standard T8 fluorescent tubes often lack sufficient intensity, so we recommend at least T5 or better even for soft corals.

The ideal photoperiod (lighting duration) is 8–12 hours. Use a timer to maintain a consistent schedule.

Husbandry Basics: Water Flow

Most soft corals prefer gentle flow. Constant strong flow from one direction can damage their tissue.

Using a wavemaker to create irregular flow patterns simulates natural reef conditions. Adjust pump placement to ensure even flow distribution across all corals.

Important: Soft Coral Toxicity

Some soft corals (especially cauliflower corals) secrete terpene compounds that can affect other corals and fish. When keeping soft and hard corals together, be mindful of species compatibility.

Additionally, wash your hands thoroughly after working in the tank. Some toxins can irritate skin.

Summary

Soft corals are ideal for beginning reef keeping. By starting with star polyps or mushroom corals and gradually expanding your collection, you can build a beautiful reef aquarium. As you upgrade your equipment incrementally, you'll discover the full joy of coral keeping.