Frogspawn Coral Care Guide: Euphyllia Divisa in Your Reef
With its round, bulbous tentacle tips swaying in the current, the frogspawn coral is one of the most recognisable LPS species in the hobby. This frogspawn coral Euphyllia divisa care guide walks you through everything needed to keep this coral healthy in a Singapore reef tank. At Gensou Aquascaping Singapore, we consider Euphyllia divisa an excellent second or third coral for hobbyists who have already conquered the basics of saltwater keeping. Its forgiving nature and dramatic movement make it a standout addition to any mixed reef.
Identifying Frogspawn Coral
Euphyllia divisa is distinguished from its close relatives — hammer and torch corals — by its tentacle tips, which resemble clusters of tiny frog eggs. Branching varieties are far more common in the trade than wall forms. Colour morphs include green, gold, purple-tipped and the increasingly popular bicolour variants. In Singapore shops along Serangoon North Avenue 1 and at C328 Clementi, healthy frags typically start from $25 to $60 per head depending on colouration.
Ideal Placement and Flow
Like other Euphyllia, frogspawn corals thrive in low to moderate, indirect flow. The tentacles should gently oscillate without being pushed flat against the skeleton. Position the colony in the lower to middle zone of your aquascape, away from direct powerhead output. An alternating flow pattern from a gyre-style pump or random mode on a wavemaker helps replicate the gentle surge frogspawn encounters on Indo-Pacific reef slopes.
Give frogspawn at least 15 cm of clearance from neighbouring corals. While frogspawn and hammer corals share the same genus and occasionally tolerate close proximity, sweeper tentacles can extend 10 cm or more at night, so caution is warranted.
Lighting Needs
Target a PAR range of 80 to 150 at the coral’s surface. Frogspawn adapts well to most modern LED fixtures used in Singapore reef tanks, including budget-friendly options and premium units alike. Photoacclimate new frags by placing them lower in the tank for the first two weeks, then gradually raising them to their final position. Signs of too much light include bleaching tentacle tips and retracted polyps during peak photoperiod.
Water Chemistry
Stability is the watchword for Euphyllia success. Maintain salinity at 1.025, alkalinity between 7.5 and 9.0 dKH, calcium at 400 to 440 ppm and magnesium at 1,250 to 1,350 ppm. Singapore’s PUB tap water is soft, so your salt mix does most of the heavy lifting for calcium and magnesium. Keep nitrate in the 2 to 10 ppm range and phosphate at 0.03 to 0.08 ppm for the best colour and tissue health.
Feeding Frogspawn
Supplemental feeding is not strictly required but noticeably accelerates growth. Offer small pieces of mysis shrimp, brine shrimp or coral-specific pellets one to two times per week. The bulbous tentacle tips are surprisingly effective at capturing and holding food. Turn off circulation briefly during feeding so particles settle on the polyps. Amino acid supplements dosed to the water column provide additional benefit for frogspawn coral Euphyllia divisa care.
Health Issues to Watch
Brown jelly infection can devastate Euphyllia colonies rapidly. If you spot a brown, gelatinous substance on the tissue, remove the affected branch immediately, dip in an iodine-based coral dip and check for alkalinity swings. Flatworms and Euphyllia-eating nudibranchs are less common but worth inspecting for during routine coral dips. Recession at the base of the skeleton often signals unstable alkalinity or excessive flow directed at the colony.
Propagation Tips
Branching frogspawn frags easily with bone cutters. Cut cleanly between individual branches, mount on frag plugs with super glue gel and allow recovery in a low-flow, moderate-light area for seven to ten days. Fragging is best done when the colony is healthy and well-fed. Many Singapore reefers propagate frogspawn to share or trade within the local community on platforms like Carousell and reef forums.
Related Reading
Continue exploring Euphyllia and reef care with Gensou Aquascaping Singapore:
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