Deissner’s Licorice Gourami — Parosphromenus deissneri: Habitat and Care

Bangka is the securely documented core of the modern species account. The Parosphromenus Project’s older page also mentions Belitung, whereas the taxonomic summary restricts confirmed records to Bangka. That difference is retained as a source limitation, not silently resolved by adding an undocumented locality to a fish’s pedigree.

Peat-associated forest waters and shaded vegetation provide the habitat context. These are specialised small-fish environments, but a home aquarium must also be serviceable. Use stable roots, low-light cover and accessible cave sites. Do not claim that a particular arrangement recreates a named wild stream unless its materials, water and collection evidence actually justify that claim.

Prepare a repeatable very-soft-water supply before acquiring fish. A practical specialist framework is 25–27°C, pH 4.5–6 and low conductivity, commonly below about 50 µS/cm, with GH and KH near the lower limit of ordinary tests. These are interpreted genus husbandry guidelines, not a newly measured species survival boundary.

EAZA’s guidance stresses suitable low-mineral water and cautions against obtaining acidity through strong-acid dosing alone. Check the starting supply and the aquarium, using equipment meaningful at low conductivity and pH. Do not transfer a higher-pH breeding report for a different Parosphromenus species as proof that deissneri needs the same conditions. Colour is not a substitute for these measurements.

Have appropriately small live invertebrates available reliably, with variety and particle size matched to the actual fish. Do not acquire this specialist on the assumption that an ordinary flake will be accepted later. Frozen or prepared items may be investigated by some stock, but should not replace the dependable ration before normal intake is demonstrated.

Feed modest portions in calm occupied areas and watch the quieter fish as well as the displaying male. Adjust delivery before increasing quantity. Uneaten live food and repeated small feeds still contribute to waste, so link feeding to an inspectable maintenance routine. Prepare a separate suitable first-food supply for fry; adult feeding success does not automatically solve the nursery’s needs.

Use established guarded filtration with gentle flow and adequate exchange. Keep nitrogen waste controlled and check the trends rather than assuming very acidic water cannot accumulate a harmful load. Secure the cover, allow air access and retain open surface gaps. A habitat inspired by forest blackwater should remain a functioning aquarium, not an opaque container that cannot be assessed.

Make matched water changes as needed for the real stocking and food load. An inflexible tiny percentage can leave waste accumulating; an unmatched large change can destabilise a specialist setting. The important preparation is suitable replacement water ready before maintenance. Keep some mature structure while cleaning accessible areas, and do not change the whole chemical routine during a brood.

A species-focused setup keeps feeding and breeding records clear. Males defend preferred sites, and a pair needs refuge and observation rather than an unconditional compatibility promise. Prepare separation if pursuit prevents normal rest or intake. Keeping every fish in view under bright lighting is not necessary, but every individual’s condition should be assessable.

Avoid mixing uncertain licorice gouramis or locality lines in a breeding arrangement. Peaceful-looking companions may still compete for live food or eat eggs. A name inherited from an old invoice is not better evidence than an accurately documented uncertain identity. Ask a specialist to review doubtful fish while retaining the original record instead of replacing it with an attractive new label.

Deissneri follows the cave-associated reproductive pattern, with eggs and a small bubble nest beneath a roof and the male tending the brood. The female needs refuge outside the immediate nest area. Do not copy a mouthbrooding Betta procedure or assume that every period spent inside a cave is a successful spawn.

Maintain stock identity, record courtship and eggs when observation allows, and avoid repeatedly disturbing the roof to count them. Have very small first foods, protected filtration and matched nursery water prepared. Follow actual development rather than transferring an experimental timetable from a different licorice gourami. The objective is healthy identified fish and young, not merely a large reported clutch.

Prepared leaves and appropriate wood can provide shade, roof edges and additional surfaces. Their effect on the water must be measured within the planned soft-water system. They do not make an unidentified fish into deissneri, replace live food or guarantee egg adhesion and survival. Keep quantities manageable and remove harmful accumulation.

For poor condition, inspect actual intake and food supply. For hiding, check pursuit and disturbance. For changed breathing, test water and review temperature and circulation. For eggs lost repeatedly, examine water consistency, brood disturbance and parental condition before escalating additives. If identity remains doubtful, flag that fact in the breeding records rather than concealing it behind a successful-looking photograph.

For the sheltered lower edge beneath the fish’s surface routes, compare Dried Bodhi Leaves (Ficus religiosa) – Aquarium Leaf Litter with Jequitiba Pod / Savu Pod. Select accessible pieces that complement the refuges while leaving atmospheric access and feeding positions open.