Forktail Blue-Eye Care Guide

Forktail Blue-Eye (Pseudomugil furcatus) is an intermediate-level freshwater fish that needs at least 10 gallons and 72-82°F. A tiny, bright yellow-and-blue rainbowfish relative with a forked tail and pale blue eyes. It does best in a group in a planted tank with neutral to slightly alkaline, clean water, and it suits calm nano community setups.

Care facts at a glance

Quick tips

• Keep a group of six or more, with more females than males.
• Avoid soft, acidic water.
• Feed small portions; it is a tiny mouth.

San Diego water

Naturally suited to San Diego's hard, alkaline tap water once it is dechlorinated (the city uses chloramine, so use a conditioner that handles it). Learn the numbers in our San Diego tap water guide.

Before you buy

Make sure your tank is cycled (how to cycle a tank), check your numbers with the water testing guide, and use the compatibility guide to check tankmates. These are general ranges; individual fish and local water vary.