SPENCER'S AQUARIUMS
Ultimate GloFish Guide
Ultimate GloFish Guide
Everything you need to know about owning GloFish — from tank setup and cycling to lighting, feeding, plants, tank mates, schooling behavior, and building a glowing aquarium that looks unreal.
Minimum School Size
Best Beginner Tank
Ideal Temperature
GloFish are genetically fluorescent freshwater fish originally developed from species like zebra danios, tetras, barbs, bettas, and rainbow sharks.
Under blue LED lighting, they glow with intense neon colors including electric blue, pink, green, orange, and purple.
Despite their futuristic appearance, GloFish care is actually very similar to normal tropical fish.
Most beginners massively underestimate how active GloFish are.
GloFish tetras are schooling fish and should NEVER be kept alone.
A 20 gallon long tank is the best beginner setup because it provides horizontal swimming space while allowing larger schools.
The lighting is what separates a normal GloFish tank from a tank that looks insane.
Creates the strongest glow effect at night.
Makes neon colors pop dramatically.
Plants create shadows and depth that enhance the glow.
The best GloFish tanks combine glowing schooling fish with peaceful bottom dwellers and calm centerpiece fish.
Perfect schooling fish for glow tanks.
Great bottom dwellers that clean leftover food.
Amazing centerpiece fish for glow tanks.
GloFish are easy to feed but beginners commonly overfeed.
Feed only what the fish can finish within 1-2 minutes.
The best GloFish tanks don't actually use tons of fake decorations.
Instead, they combine: