© Lerdsuwa / CC BY-SA 3.0Hong Kong Pleco
The Hong Kong Pleco is a freshwater fish native to fast-flowing mountain streams in China, growing to about 5.4 to 8cm as an adult. Despite its name, it isn't related to the South American plecos most aquarists know — its most distinctive trait is a flat, disc-shaped body that lets it cling tightly to rocks. Its body is covered in fine speckles, and in the aquarium it spends its time grazing on algae growing on rock surfaces. Because it thrives in strong current with cold, oxygen-rich water, keeping the tank conditions right takes some experience, making it a fish best suited to intermediate keepers. It isn't considered a good tankmate for goldfish, which prefer calmer water.
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Apply as a breederHong Kong Pleco key facts
- Care level
- Intermediate
- Lifespan
- 10-15 years
- Size
- 5.4-8cm
- Temperature
- 16〜24℃
- Diet
- Benthic algae, home-made foods with Spirulina, vegetable-based dried foods
- Tank
- Seriously Fish suggests a 60 x 30cm base of about 54 litres. Layer water-worn stones of varying size over sand and gravel, and create a turnover of 10 to 15 times per hour. Keep lighting strong to grow algae.
- Water Temperature & Quality
- Seriously Fish gives 16-24C, pH 6.5-8.0 and 2-15dGH. Clean, well-oxygenated water is essential, and sustained warmth wears it down.
- Tank Mates
- Largely peaceful, but tankmates are limited to species that share its conditions, such as small cyprinids, Rhinogobius gobies and rheophilic catfishes. Seriously Fish states that it makes a poor companion for goldfish.
- Diet & Feeding
- Its staple is algae and micro-organisms rasped from surfaces. Home-made foods bound with gelatin and rich in vegetables or Spirulina suit it. Too much animal food such as bloodworm causes internal problems.
- Breeding & Spawning
- It is presumed to be a seasonal spawner in the wild, but Seriously Fish knows of no record of aquarium breeding.
- Health & Notes
- It forms loose aggregations in the wild, so a group of six or more settles better. Shipments sometimes contain other genera, so check the pattern when choosing. IUCN status is Least Concern.
About Hong Kong Pleco
Hong Kong Pleco is a flat, disc-bodied stream fish from China reaching 5.4 to 8cm, grazing on rock algae. It needs strong current and cool, oxygen-rich water, making it best suited to intermediate keepers.
7 things to know before welcoming a Hong Kong Pleco
1Strong Current Is a Must
Hong Kong Plecos come from fast-flowing mountain streams, so recreating strong current in the tank matters. Use a water pump to keep the tank well-oxygenated.
2Prefers Cooler Water
Living in cold highland streams, this fish doesn't tolerate high temperatures well. Watch for rising water temperature in summer and consider a chiller if needed.
3Clings Tightly to Rocks
Its flat, disc-shaped body lets it grip rocks and glass almost like a suction cup. Adding plenty of rocks for footholds helps it settle in comfortably.
4Diet Is Mainly Algae
It feeds by scraping algae and biofilm off rock surfaces. Since natural algae in the tank usually isn't enough on its own, supplement with sinking algae tablets.
5Not a Goldfish Tankmate
Goldfish prefer calmer water, which conflicts with the strong current this species needs. If choosing tankmates, look for other stream fish that also enjoy current.
6Stays a Compact 5.4-8cm
Even as an adult, this fish stays a manageable 5.4 to 8cm. A tank with enough rock surface for its size is all that's needed.
7Best for Intermediate Keepers
Balancing current, temperature, and oxygen levels all at once takes some know-how. It's better suited to keepers with some prior aquarium experience than as a first fish.
Frequently asked questions about Hong Kong Pleco
- Q.Is the Hong Kong Pleco really a "pleco"?
- A.No, it belongs to a different family than the South American catfish plecos most people know. It's nicknamed "pleco" because its flat body clinging to rocks looks similar.
- Q.How much water current does it need?
- A.It prefers strong current, similar to the mountain streams it comes from in China. A water pump can help create a flowing, well-oxygenated environment.
- Q.What water temperature is best?
- A.Since it comes from cold highland streams, it's important to keep the water on the cooler side and avoid high temperatures, especially in summer.
- Q.What should I feed it?
- A.In the wild, it grazes on algae and biofilm growing on rocks. Since natural algae in a tank is often not enough, sinking algae tablets made for plecos are a good supplement.
- Q.Can it be kept with goldfish?
- A.Goldfish prefer calmer water, so they aren't considered a good match for the Hong Kong Pleco, which needs strong current.
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