Discus vs Angelfish vs Uaru Comparison Guide: Showpiece Cichlid Pick
Three Amazonian disc-shaped cichlids anchor the high-end planted tank category in Singapore, and the price gulf between them is enormous. The discus vs angelfish vs uaru decision balances tank size, water expertise and budget — get it wrong and a SGD 200 discus dies in week three. This guide from Gensou Aquascaping at 5 Everton Park ranks the trio for serious aquascapers.
Quick Verdict
Pick angelfish if you want a hardy disc-shaped centrepiece for a 200-litre planted tank without specialist water. Pick discus if you have advanced experience, RO/DI water capability and 250+ litres for a proper school of six. Pick uaru only if you want the rare specialist option in a 400-litre+ biotope.
Angelfish: The Hardy Showpiece
The angelfish (Pterophyllum scalare) reaches 15cm body length with vertical fin extensions taking total height to 20cm+. Wild-type silver-and-black, marble, koi, platinum and altum morphs are common. Water tolerance: pH 6.0-7.5, GH 4-15, temperature 24-28°C — they handle Singapore PUB tap with minor adjustment. Lifespan 8-10 years. Pair-form territorial in 200-litre+ tanks; six-strong groups split into pairs naturally. Bioload moderate. They eat anything that fits in their mouth, so skip neons and shrimp.
Discus: The Demanding Centrepiece
Discus (Symphysodon aequifasciatus and S. discus) hit 15-20cm disc diameter with the iconic flat compressed body and elaborate red, blue, turquoise and pigeon blood colour patterns. Water demands are strict: pH 5.5-6.8, GH 1-4, temperature 28-31°C. They are obligate schoolers — six minimum, ideally eight to spread aggression. Daily feeding, frequent water changes (50 per cent every two days during grow-out) and stable mature filtration are non-negotiable. Lifespan 8-12 years if husbandry is right.
Uaru: The Rare Specialist
The uaru (Uaru amphiacanthoides) reaches 25-30cm with a triangular body, dusky brown adult colouration and a distinctive black wedge marking. Juveniles wear a dramatic spangled pattern that fades over 18 months. Water needs: pH 5.0-6.5, GH 1-4, temperature 26-30°C. Tank: 400-litre minimum for a pair. They are herbivorous-leaning and decimate planted tanks — biotope hardscape with botanicals only. Rarely imported into Singapore. Lifespan 12-15 years.
Side-by-Side Spec Comparison
Size: angelfish 15cm, discus 18cm, uaru 28cm. Tank minimum: angelfish 200L, discus 250L for school, uaru 400L. Water demand: angelfish forgiving, discus strict soft acidic, uaru strict and biotope-focused. Lifespan: angelfish 8-10 years, discus 8-12, uaru 12-15. Plant compatibility: angelfish good, discus good with hardy plants, uaru destroys plants. Price: angelfish SGD 15-50, discus SGD 80-400, uaru SGD 60-150 when available.
Decision Framework
If this is your first large cichlid and you want a planted display, angelfish is the only sensible answer. If you have 5+ years of aquarium experience, run a stable mature tank, and have RO/DI capability with 250-litre+ space, discus is achievable. If you want a centrepiece nobody else has, accept that the tank will be hardscape-only, and have 400-litre+ space, uaru fits. Never combine the three — discus and angels carry pathogens cross-fatal to each other, and uaru bullies both.
Singapore Sourcing and Pricing
Angelfish are Iwarna and Polyart staples at SGD 15-50, with imported koi and platinum morphs at the upper range. Discus splits into local-bred (SGD 80-180), Stendker imports (SGD 200-350) and Asian show-grade (SGD 250-400). Discus specialists like Forrest Aquarium and Wild Life World stock the higher tiers. Uaru imports come through Iwarna sporadically at SGD 60-150 — wait list weeks ahead. Pair any with quality food from the food range and substantial filtration from the filter range.
Common Mistakes
Buying single discus is the universal beginner killer — they school-bond and singletons stop eating within weeks. Second mistake: keeping discus below 28°C, which suppresses appetite and immune response. Third: housing angelfish with neon tetras as fry food source — works for two months until the angels grow out. Fourth: putting uaru in a planted tank — they shred Amazon swords overnight. Fifth: under-sizing discus tanks under 250 litres for proper schools.
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
