Care, Placement & Feeding Tips

Frogspawn coral (Euphyllia divisa) is a very popular option for reef tank owners, and it’s not hard to see why. This large polyp stony coral is absolutely stunning to look at!

Despite its popularity, there is a lot of misinformation floating around online when it comes to frog coral care. This sabotages new owners who end up seeing inaccurate information regarding ideal water parameters, lighting, and placement.

That’s why we created this guide. In this document, you’ll learn everything you need to know about frog coral care so you can help yours thrive!

Species Summary

Frogspawn coral is a species that can be found in a variety of places around the world. Australia, Fiji, Southeast Asia, Soloman Island, and the Ryukyu Islands are all places where Euphyllia divisa can be easily found.

Sometimes you will hear frog coral called wall coral, grape coral, octopus coral or honey coral. For the sake of clarity, we prefer to refer to it by its common name (and sometimes its scientific name).

Unlike some other coral species, frog polyps stay out 24/7, making them perfect for viewing in a home aquarium.

Frogspawn coral is a fairly hardy species that can tolerate a decent range of water settings and conditions. That being said, many people overestimate it when it comes to care (and that can have dire consequences).

Its ideal environment is at depths of 120 to 140 feet. It does not like sandy bottoms and thrives where there is more mud. Although it is known to be aggressive when it comes to bullying other corals for space, they are found in rather modest sized colonies.

Appearance

The appearance of frog coral is one of the most common reasons people add them to their tanks. This coral is truly something to behold, and when you combine it with interesting lighting, it enhances their appearance even more!

As for the structural composition of this species, it will vary depending on what you get. Frogspawn coral can grow like a branch which spreads and grows quite quickly. It can also grow like a wall where everything sticks together a bit more.

The real appeal of this animal, however, is the colors. Some of the most popular colors that stand out are green and yellow. The color of the tentacles adds to the effect. It will either be a light color like white or a variation of pink.

Green frog coral creating a glowing effect

There are frog corals that end up being blue or orange, but we don’t see them as often. Blue tends to look a little less exotic in the tank, and orange is hard to come by.

Bright coloring like this creates a glowing effect in the right lighting conditions (almost neon). This unique feel can totally change the aesthetics of a tank, and that’s why this coral is so appealing.

Author’s note: Frogspawn coral can grow to an indentation nearly 10 inches wide. This information will help you later to determine the correct location.

Frogspawn Coral Care

Frogspawn coral care requires a bit of knowledge, but you don’t have to be an expert to keep it in your aquarium. It’s really about understanding the main parameters of water and its aggressive nature in order to create the right environment for it to thrive.

As long as you familiarize yourself with and follow the basics of caring for this coral, you will be fine.

tank size

The ideal tank size for frog coral is at least 30 gallons. We’ve heard of owners keeping them in smaller tanks like 20-50 gallons, but it’s not recommended. This coral has a decent growth rate and needs a bit of room to stretch.

Water parameters

Getting the water parameters right is definitely something you need to do if you want to provide good frog coral care. It can tolerate a good range of levels, but you should always aim to keep things as perfect as possible.

  • Water temperature: 72° to 78°F
  • pH levels: 8.1 to 8.4
  • Water hardness: 8 to 12 dKH
  • Specific gravity: 1.022 to 1.025

It is always recommended to regularly use a reliable water test kit to ensure that the water parameters remain within the recommended levels. This will allow you to take care of any unexpected level changes before they become a serious problem.

The flow of water

Ensuring there is adequate water flow is an important part of caring for frog corals. You will want to aim for moderate water flow with this coral, but a higher hit can be tolerated if absolutely necessary (if needed for other lives in your tank for example). Keep in mind that high water flow can negatively impact polyp growth and health.

One of the other benefits of having decent water flow is that it allows you to really enjoy the beauty of this coral. Flowing water creates a beautiful effect as it will sway and bring out the colors!

Lighting

Frogspawn coral needs an average amount of light to stay healthy and grow. You don’t need to blow light like you do with other corals, although they can tolerate it.

Try to mimic the lighting environment of where you purchased it. Sudden changes in lighting may cause poor reaction or damage to coral. This is something that is often irreversible, so take lighting seriously!

Frogspawn Coral Placement

Frogspawn coral placement is a very important piece of the puzzle when it comes to providing good healing. Generally you want to try to place it in the middle or top of the tank with a good 6-8 inch buffer between it and the other corals.

The reason for the buffer space is that it’s not only decently sized, but also quite aggressive. It has sweeping tentacles which it uses to clear space by injuring surrounding corals. It’s no joke and frog coral usually comes out on top when it comes to a battle for real estate.

Author’s note: If your lighting is low or moderate, you’ll probably want to place this coral closer to the top of the tank than the middle. This will ensure that it receives enough light to facilitate growth and general health.

Feed

Feeding frog coral in a home aquarium is full of options. In their natural habitat, this coral gets its nutrients from organic matter and food particles that get caught. It also uses seaweed as another excellent source of nutrition.

Feeding is a little simpler in captivity. You will want to use some of the standard foods like brine shrimp, micro plankton, or high protein frozen foods. There are also owners who like to sprinkle pellets to top it all off.

Pellets are one of those things that some homeowners swear by, and others think it doesn’t make sense. Our only recommendation for you is to experiment for yourself! There really is no downside to trying a pellet feed and not seeing significant benefits (as long as you don’t let it negatively affect water quality).

Spread

This process is something many new owners want to understand. With so many newbies getting frog coral, it’s only natural that there are a lot of questions.

Before you begin, it’s important to understand the type of Euphyllia divisa you have. If you have the wall type, it will be a little more difficult (but not impossible). The branched type is generally more receptive to this process.

There are a number of sophisticated methods experienced owners use to propagate and grow new coral, but we’ll stick to the basics. They are much easier to implement and can achieve great results, no need to complicate things!

To start, identify a piece of healthy coral. This will have solid staining, good polyp visibility, and no visible damage.

A fragmented piece of Euphyllia divisa

Once you have your candidate, it’s time to start cutting. Take a saw and remove a few inches from the sound piece. Make sure your saw is sharp and easy to use. Wrong tools often cause unnecessary damage during the cutting process.

Now that you’ve removed the healthy piece, it’s time to find a new home for it. Follow the basics of frog coral placement when choosing a location. A medium to high spot in the aquarium with light and buffer space is the way to go.

From there, all you have to do is anchor the separate piece of coral to a rock or plug. After that, you don’t have to do anything special!

In summary

Frogspawn coral is an amazing and beautiful animal to add to your aquarium. The mesmerizing effect it has when water drips can totally take over a room (in a good way).

It is also a fun coral to maintain. It falls well between the “easy” and “moderate” difficulty levels and is a great introduction to coral care for beginners.

We strongly recommend that you purchase some for your own tank. As long as you follow basic care guidelines and stay consistent, you’ll enjoy its stunning visual appeal for quite some time.

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