Asian Gold Clam Complete Care Guide: Corbicula Care
The little cream-and-green striped clam that settles into the sand of a mature planted tank looks unassuming, yet it filters several litres of water per day through its gills. This asian gold clam complete care guide covers Corbicula fluminea from mature-tank prerequisites through feeding, substrate choice and the sourcing realities in Singapore. Written by the team at Gensou Aquascaping, 5 Everton Park, drawing on over 20 years of hands-on experience with filter-feeder livestock.
Species Identification
Corbicula fluminea is the Asian clam — a freshwater bivalve 2-4 cm across with distinctive concentric ridges and a pale gold-to-olive shell. The name “gold clam” in the hobby refers to the yellowish inner nacre visible when the animal parts its valves. Sold also as “Singapore clam” in some shops, but the animal originates from the Yangtze basin and has naturalised throughout Southeast Asia. Lifespan in a well-kept aquarium is two to four years.
Tank Age — The Non-Negotiable
Any tank under four months old lacks the dissolved organics, biofilm and suspended microalgae this clam relies on. Placing a Corbicula in a freshly cycled aquarium is effectively starvation by design. Use a minimum six-month-old planted tank with visible biofilm on glass and driftwood, some algae growth permitted, and an established cleanup crew already running. Tanks with weekly 50 per cent water changes strip food faster than the clam can eat — space water changes further apart.
Substrate Setup
A 4-6 cm bed of 0.5-1 mm sand is the correct substrate. Singapore keepers commonly use JBL Sansibar, ADA Aqua Soil Amazonia topped with sand, or plain silica play sand rinsed thoroughly. Coarse gravel or pebble substrates do not allow the clam to bury — it sits stressed on top for days, often refusing to filter. Create a dedicated sand pocket in one corner of a mixed-substrate aquascape if you cannot change the whole tank; the clam will locate and burrow into it within hours. Pick up fine sand from the decoration and substrate range.
Water Parameters
Temperature 22-28 degrees Celsius, pH 6.8-7.8, GH 6-12, KH 3-8, nitrate under 20 mg/L. Singapore tap water at GH 2-4 is too soft; add a pinch of crushed coral in a filter media bag or dose Seachem Equilibrium to raise hardness to at least GH 6. Chlorinated tap water kills clams within hours — always dechlorinate with Prime or similar before any water change. Browse the water care range for mineral supplements suitable for invertebrates.
Feeding Schedule
Even in a mature tank, direct feeding improves longevity. Dose 1-2 ml of reef phytoplankton concentrate (Brightwell PhytoGreen-M, Kent PhytoPlex) or a small pinch of Kenmure live phytoplankton powder per 40 litres, twice a week. Target-feed with a turkey baster directly above the clam’s inhalant siphon — the larger, rounded opening. Observe the clam for 30 seconds after feeding; you should see a slight dust cloud being drawn in. Clams that ignore phytoplankton for more than a fortnight are either buried too shallowly or already unwell.
Tank Size and Stocking
One clam per 40 litres is the ceiling for passive feeding. Two clams in a 60-litre nano is workable with twice-weekly supplementation. Below 30 litres the water column simply does not carry enough suspended food, regardless of how old the tank is. Larger display aquascapes of 120 litres and up can host three to four clams without trouble, especially if the tank receives modest light-driven microalgae production.
Tank Mates
Ember tetras, rasboras, pygmy corydoras, otocinclus, neocaridina shrimp and nerite snails are all safe companions. Avoid freshwater puffers, large crayfish, clown loaches and any cichlid large enough to pick at a shell. A tank mate that persistently uproots a buried clam stresses it quickly; rehome either the clam or the offender within a week of noticing the behaviour.
Health Signs and Warning Signals
A healthy Corbicula sits half-buried with siphons extended, closes its shell when touched, and feels heavy for its size. A clam that gapes open permanently, sits on top of the substrate despite repeated reburial, or releases a sulphur odour is dead or dying — remove immediately, as decomposition can spike ammonia 1 mg/L or higher in a nano tank overnight. The classic test is lifting the animal: a live clam is dense, a dead one feels hollow or oddly light.
Sourcing in Singapore
Asian gold clams appear sporadically at C328 Clementi and Iwarna, usually SGD 2-4 per clam. Carousell has occasional hobbyist listings from keepers thinning a populous tank. Seaview and some Thomson shops carry them as “filter clams” at similar prices. Avoid any shop selling clams from a tank with visibly dead specimens or cloudy water — the batch is almost certainly compromised. Quarantine any new clam in an established 10-litre holding tank for a week before adding to a display aquascape.
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Still Have Questions About Your Tank?
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5 Everton Park #01-34B, Singapore 080005 · Open daily 11am – 8pm
