Tank size
What Tank Size Do Guppies Need?
Choosing a guppy tank? Learn why around 60 litres is a useful starting point, how shape matters and why breeding changes your space needs.
3 min readGuppy care, explained
Small fish.
Plenty of questions.
Surprise babies? Unsure how much to feed? Start with the question on your mind, and leave knowing what to do next.
Start here · Newborn care
Just spotted
baby guppies?
Before you reach for a net or buy a breeding box, find out what the babies actually need—and when it makes sense to leave them where they are.
My guppy had babies. What now? →Your first priorities
- 01Somewhere to hide
Give newborns cover from the adults.
- 02A safe aquarium
Check the filter intake and water conditions.
- 03Food that fits
Offer tiny meals those tiny mouths can manage.
Tank setup & water
Get the aquarium ready for your fishTemperature
Do Guppies Need a Heater?
Most home guppy tanks need a heater. Learn which temperature to aim for, how to check it and what to do if the water gets too hot or cold.
3 min readFiltration
Do Guppies Need a Filter?
Understand why guppies need filtration, when a sponge filter works, how cycling helps and how to clean media without disrupting the aquarium.
3 min readWater quality
What Water Parameters Do Guppies Need?
A clear guide to guppy temperature, pH, GH, KH, ammonia, nitrite and nitrate, with advice on testing and avoiding unnecessary adjustments.
3 min readFeeding & choosing fish
Plan your group and its everyday careEveryday feeding
How Much Should You Feed Guppies—and How Often?
Feed healthy adult guppies one or two small meals a day. Learn how to judge portions, spot waste and avoid mistaking eager feeding for hunger.
4 min readChoosing your fish
Male or Female Guppy? How to Tell the Difference
The anal fin is the clearest way to sex adult guppies. Learn what to look for, why colour can mislead you and how to check developing youngsters.
4 min readStocking
How Many Guppies Can You Keep Together?
Plan a sensible guppy group using tank space, filtration, sex ratio and future fry—not a misleading fish-per-litre formula.
3 min readMale-only groups
Can You Keep Only Male Guppies?
A male-only guppy tank can avoid breeding. Learn how to choose a group, recognise bullying and provide space without creating new problems.
3 min readTank mates
What Fish Can Live with Guppies?
Choose guppy tank mates by water needs, adult size, temperament and space. Explore livebearers, fin-nipping risks and why species details matter.
4 min readBabies & breeding
From the first signs to the first mealsNewborn care
My Guppy Just Had Babies—What Should I Do Now?
What to do when you discover guppy fry: give them cover, check the filter, offer suitable food and decide whether they need a separate tank.
4 min readFeeding fry
What Should You Feed Guppy Fry? A Guide to Their First Foods
Guppy fry can eat finely crushed flake, suitable powdered fry food and newly hatched brine shrimp. Learn how to feed them without overwhelming the tank.
4 min readBreeding
Is My Guppy Pregnant? Signs to Look For
Learn which signs suggest a guppy is pregnant, why a gravid spot cannot predict the birth and what to do when you think babies are on the way.
4 min readProtecting fry
Do Guppies Eat Their Babies? How to Protect Fry
Adult guppies can eat their fry. Learn when planting helps, when to use a prepared rearing tank and why extra food is not reliable protection.
3 min readHealth & troubleshooting
Recognise changes and know what to check firstBreathing & behaviour
Why Are My Guppies Staying at the Top of the Tank?
Learn the difference between normal surface swimming and gasping, with immediate checks for oxygen, temperature and water quality.
4 min readTroubleshooting
Why Are My Guppies Dying? What to Check First
Start with water tests, equipment and recent changes when guppies die. Work through common causes and know when to seek specialist help.
4 min read
The complete guide
Make your next step
a confident one.
Bring it all together with Guppies: 198 pages on choosing your fish, their aquarium, feeding, breeding and raising the next generation.
Digital edition in PDF format. Read on your phone, tablet or computer.