CAPTIVE BRED · CONSERVATION LINE · GROUP OF 6

Xenotoca eiseni “San Marcos” — Captive-bred group

Xenotoca eiseni

Demo taxon · AquaSource care sheet attached where available

✓ Goodeid Working Group UK · ★ 100% positive

£42.00

A young captive-bred group of six from a documented UK conservation line: three males and three females, approximately 4–5 cm.

Quantity6 fish

Sex ratio3 ♂ / 3 ♀

Size4–5 cm

GenerationUK F4

Delivery: Specialist livestock courier included in this test order
Collection: Available by arrangement

Stripe test mode · no real money will be taken

Breeder’s water parameters

Measured 12 August 2026

These are the conditions this group is currently maintained in—not rigid limits for the species.

Temperature20–23 °C

pH7.2–7.8

GH10–16 dGH

KH6–10 dKH

Conductivity480 µS/cm

Nitrate< 20 mg/l

Seller note: “Our stock is kept unheated in a well-oxygenated species tank. We recommend matching temperature first, then acclimating gradually to hardness.”

AQUASOURCE SPECIES CARE SHEET · VERIFIED TAXON

Redtail Splitfin care profile

Xenotoca eiseni · Goodeidae · COL 7FW8N · Care-sheet v1 · Reviewed 2026-08-20

✓ Specialist-sourced

ExperienceIntermediate

Minimum aquarium250 litres+

Social needsMaintain as a structured group; monitor adult aggression

DietOmnivore with vegetable/algal component

Temperature18–24 °C

pHApprox. 7.0–8.2

HardnessModerate to hard water; stability is more important than chasing a number

Overview

Redtail Splitfin is a livebearing Goodeid. AquaSource recommends keeping documented locality or population information with the fish wherever it is known, and avoiding casual mixing of distinct conservation lines.

Housing & behaviour

Use a spacious, strongly filtered aquarium with generous floor area, open swimming room and substantial visual barriers. These active fish are poor candidates for cramped community tanks.

Feeding

Feed a varied diet built around quality prepared foods with regular vegetable/algal material and appropriately sized frozen or live foods. Avoid an excessively protein-heavy diet for predominantly grazing species.

Breeding

Goodeids are livebearers with comparatively large young. Provide cover for females and newborn fry, maintain excellent water quality, and record parentage/locality information when keeping a conservation line.

Species note: Assertive adults need substantial space and visual breaks. Specialist husbandry guidance favours high oxygen and seasonal cooler periods rather than year-round heat.