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Polypterus senegalus - Tropical Fish for Sale UK
£18.26£20.99
A Moenkhausia-genus tetra from South America for peaceful communities. Mature, stable aquariums only — full compatibility notes on the page.
Moenkhausia costae
A Moenkhausia-genus tetra from South America for peaceful communities. Mature, stable aquariums only — full compatibility notes on the page.
Building a peaceful South American community gives you plenty of stocking decisions, and the tetra you choose sets the tone for the whole tank. This listing is for Moenkhausia costae, a member of the Moenkhausia genus from our South American tetra range, supplied against its exact scientific name so the fish you research is the fish you receive.
Temperament-matching matters more with tetras than almost anything else. For this species our compatibility data points one way: keep it with peaceful companions of a suitable size that share similar water requirements, and rule out three categories entirely — aggressive fish, confirmed fin nippers, and tank mates large enough to swallow a tetra. Work from the adult-size guidance on this page when planning companions; a fish chosen to suit a juvenile can become a problem as everything grows.
Feeding is straightforward: offer appropriate aquarium foods for this livestock group and keep portions modest, using appetite, body condition and water quality as your guide. What is not negotiable is the tank itself — only introduce this tetra to a mature aquarium with stable, well-filtered water.
Introduce new arrivals carefully. After your delivery — packed in oxygenated bags and carried by a licensed live-animal courier with live arrival support — float and acclimate gradually, dim the lighting, and skip heavy feeding on day one. The first week is your observation window: breathing, posture, colour and appetite tell you quickly whether the fish has settled in. Quarantine-style observation is simpler when the rest of the tank is calm, so avoid making other big changes — rescapes, equipment swaps, large water changes — in the same week your new tetras arrive; give the new group your attention and little else. Order when your aquarium is genuinely ready rather than cycling around new livestock, and your Moenkhausia costae will have the best possible start in its new home.
24–28°C · pH 6.5–7.5 · 2000L
24–28°C · pH 5.5–7 · 60L
24–28°C · pH 7.5–8.5 · 400L
22–26°C · pH 6–7.5 · 150L
24–28°C · pH 7.5–8.5 · 500L
22–26°C · pH 6–7.5 · 30L
24–28°C · pH 7.5–8.5 · 150L
24–28°C · pH 7.5–8.5 · 200L
18–25°C · pH 6–8 · 100L
18–28°C · pH 6.5–8 · 20L
24–27°C · pH 7.5–8.8 · 150L
22–26°C · pH 6–7.5 · 60L