Indian Glassfish Care Guide: Parambassis Ranga Transparent Beauty
Transparent enough to reveal its skeleton and swim bladder, the Indian glassfish (Parambassis ranga) is one of the most visually unique freshwater species you can keep. Sadly, this fish has been plagued by the unethical practice of dye injection, but healthy, undyed specimens are stunning in their own right. This Indian glassfish care guide from Gensou Aquascaping at 5 Everton Park, Singapore, covers everything you need to keep these delicate fish thriving naturally.
Identifying Healthy, Undyed Specimens
Always avoid glassfish with unnatural neon stripes of pink, green, or blue running through their bodies. These fish have been injected with dye, a cruel process that shortens lifespan and increases disease susceptibility. Natural Parambassis ranga display a clear, amber-tinted body with subtle iridescent highlights along the dorsal ridge. Reputable shops in Singapore stock undyed specimens; if in doubt, ask the seller directly.
Tank Size and Environment
A group of six or more is essential, as solitary glassfish become stressed and hide constantly. A 60 litre tank accommodates a comfortable school. Dense planting with species like Vallisneria, Cryptocoryne, and Java fern provides the shaded retreats these fish favour. Moderate lighting suits them better than intense aquascaping lights, though they adapt to brighter setups if plant cover is sufficient.
Gentle to moderate water flow from a hang-on-back or sponge filter replicates the slow-moving streams and ponds of their native South Asian range.
Water Parameters
There is a persistent myth that glassfish require brackish water. While they tolerate slight salinity, P. ranga is a true freshwater species that thrives in pure freshwater conditions. Singapore’s PUB tap water, dechloraminated, provides a good baseline at pH 6.8-7.2 and GH 2-4. They accept temperatures from 22-30 °C, well within the range of an unheated Singapore aquarium at 27-29 °C.
Weekly water changes of 20-25% maintain the clean conditions these fish need. They are moderately sensitive to ammonia and nitrite, so ensure your tank is fully cycled before introducing them.
Feeding Requirements
Glassfish are micro-predators that strongly prefer live and frozen foods. Daphnia, baby brine shrimp, and frozen bloodworms should form the core of their diet. They can be trained to accept high-quality micro pellets over time, but dry food alone often leads to poor colour and condition.
Feed small portions twice daily. Watch their transparent bellies; you can literally see when they have eaten, which makes portion control straightforward.
Behaviour and Social Dynamics
Males establish small territories and display to each other with subtle fin flaring and body shimmering. These interactions are peaceful and add interest to the tank. Females are rounder-bodied when gravid. The school tends to occupy mid-water areas, hovering among plant stems during the day and becoming slightly more active at dusk.
Breeding Indian Glassfish
Spawning occurs among fine-leaved plants or spawning mops. Males court females with vibrating displays at dawn. Eggs are scattered and adhesive, sticking to plant surfaces. A separate breeding tank with Java moss or synthetic spawning mops improves egg survival, as adults do eat their own eggs.
Eggs hatch in 24-36 hours at 27 °C. Fry are extremely small and require infusoria for the first week before graduating to newly hatched brine shrimp. Raising fry demands clean water and frequent, tiny feedings throughout the day.
Compatible Tank Mates
Pair glassfish with other peaceful, similarly sized species. Small rasboras like Boraras brigittae, honey gouramis, kuhli loaches, and Corydoras catfish all coexist well. Avoid fin nippers like tiger barbs and large, boisterous species that may intimidate these gentle fish. Dwarf shrimp are generally safe companions, though very small shrimplets may occasionally be picked off.
Health and Longevity
Healthy, undyed Indian glassfish live three to five years. Their transparent bodies make disease detection easier than with most species; internal parasites, bloating, and organ discolouration are all visible through the skin. Quarantine new arrivals for two weeks and treat prophylactically with a mild anti-parasitic if their origin is uncertain. Gensou Aquascaping Singapore stocks these fish periodically and can advise on sourcing ethically raised specimens from trusted local suppliers.
Related Reading
emilynakatani
Still Have Questions About Your Tank?
Drop by Gensou Aquascaping — most walk-in questions get answered in under 10 minutes by someone who has set up hundreds of tanks.
5 Everton Park #01-34B, Singapore 080005 · Open daily 11am – 8pm
