Tanichthys Micagemmae Firefly Minnow Care Guide
The Vietnamese firefly minnow looks like a smaller, neon-flanked cousin of the white cloud and is one of the more rewarding micro-fish to land on Singapore Shopee blackwater drops. This tanichthys micagemmae firefly care guide from Gensou Aquascaping at 5 Everton Park draws on three years of keeping Tanichthys micagemmae in HDB-scale planted tanks, including a successful breeding project under PUB tap conditions. Expect specific water targets, diet notes, and the small environmental tweaks that bring out the species’ best colour.
Origins and Natural Habitat
Described from central Vietnam in 2001, Tanichthys micagemmae inhabits cool, clear, slow-flowing streams in Quang Binh Province, often within reach of seasonal monsoon flushing. Wild water tests at 20 to 26 degrees Celsius, pH 6.4 to 7.0, and very low GH around 1 to 3. The species is now protected at source and most aquarium specimens are tank-bred from Eastern European or domestic farms, occasionally appearing in Singapore through specialist Shopee importers around Aquarama season.
Identification
Adults reach 28 to 32 mm and show a thin red dorsal flash, a luminous green-blue lateral line and bright red caudal edges that flicker under suspended LED light, hence the firefly common name. Males develop sharper edges to the dorsal and caudal red, and slightly slimmer profiles. Females carry visibly fuller bellies once mature. Compared to the closely related white cloud mountain minnow, micagemmae is smaller, brighter and more sensitive to warm water.
Tank Size and Layout
A 30 to 45 litre tank holds a starter shoal of eight to twelve adults comfortably. Footprint matters more than volume; a 45 cm by 30 cm base outperforms a tall 30 by 30 by 40 even at the same volume. Aquascape with fine-leaved plants such as myriophyllum, mosses and a soft sand substrate. Cool-water riparian wood from the C328 Clementi botanical wall completes a passable Vietnamese stream look.
Water Parameters in Singapore
The species tolerates 24 to 28 degrees but colours best at 24 to 26, which means a chiller or a strong fan in most Singapore HDB flats running ambient 29 to 31 degrees. PUB tap is a near-perfect match for chemistry: pH 6.5 to 7.2 and GH 2 to 4 sit right on the species’ preferences. Avoid heavy CO2 swings, which shrink the visible colour to a muted brown. Our monsoon climate management guide covers chiller sizing.
Diet and Feeding
Micagemmae are micro-predators that thrive on small live and frozen foods. Newly hatched brine shrimp, daphnia, microworm, and crushed flake all work; vary across the week to prevent dietary monotony. Feed twice daily in small amounts the shoal clears within thirty seconds. Dry food alone is acceptable but produces noticeably duller colour after six weeks; supplement with frozen daphnia or live microworm twice weekly. Our microworm culture guide covers the easy home setup.
Tank Mates
Pair with other small, peaceful, cool-water tolerant species such as celestial pearl danio, dwarf Corydoras hastatus, or other Tanichthys species. Avoid fin-nippers, larger barbs, and anything that hits 5 cm in adulthood. Shrimp such as Neocaridina coexist peacefully because micagemmae rarely bother adult shrimp, though juvenile shrimp may be picked at during fry phases. Keep them away from larger danios that out-compete at feeding.
Behaviour and Schooling
This is a true schooling species; below six individuals, colours fade and the shoal disperses. At twelve or more, the lateral line lights up and males begin sparring with quick fin-flares that show maximum colour. Place schools mid-water and provide an open swim lane along the front glass; the species wastes its display in cluttered hardscape.
Breeding Notes
Micagemmae is an egg-scatterer that spawns continuously when conditions are right. Drop water temperature to 22 degrees for a week to simulate seasonal cooling, then return to 25 degrees and feed live food daily; spawning typically begins within three days. Eggs land in moss or spawning mops; remove parents after spawning to prevent egg predation. Fry hatch at 60 to 72 hours and require infusoria for the first week, graduating to microworm by day ten.
Lighting and Plant Pairing
The fish itself looks best under cool-white LED with subtle blue, around 6500 K, which matches Chihiros WRGB II default settings reviewed in our Chihiros vs Twinstar comparison. Pair with low-tech epiphytes and grass species; a dense plant background heightens the lateral-line shimmer when the fish swim past. Avoid heavily blackwater setups because the colour disappears against tannin-stained backdrops.
Common Health Issues
The species is hardy but sensitive to chlorine and chloramine spikes from poorly dechlorinated PUB tap top-ups. Symptoms include flashing against substrate, clamped fins and pale colour. A Seachem Prime double-dose during weekly water changes prevents most issues. Watch for ich during cool-down spawning triggers; raise temperature to 28 degrees and dose mild copper-free treatment if spots appear.
Where to Buy and Why Choose Micagemmae
Micagemmae appears irregularly at C328 Clementi and select Thomson shops at SGD 5 to 9 per fish. Quality Shopee blackwater importers occasionally list groups of twelve at SGD 60 to 80 with quarantine guarantees, and Aquarama trade shows in May or June are a strong buying window. For Singapore keepers wanting a colour-rich nano shoaler that does not need 32-degree tropical conditions, Tanichthys micagemmae sits in a small but rewarding niche, with small size, vivid lateral line and peaceful temperament making it a natural headline species for a 45 cm cool-stream nano scape.
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