🦎 How to Set Up a Newt Tank (Cool Water, Land and Water)

A pet newt is a charming, watch-don't-hold amphibian, and the single rule that matters most is this: keep it cool. Newts are not tropical pets, and a warm tank is the number-one cause of newt illness. Most beginner newts are semi-aquatic, meaning they need a tank that is part water and part land. Get the temperature and the layout right, and a newt is a genuinely easy, rewarding pet to keep.

Tank size and layout

A 10 to 20 gallon long tank suits most beginner newts nicely. Because newts split their time between swimming and resting out of the water, the tank should be part water and part land. Give your newt an easy way out of the water — a sloped shore or a floating platform it can climb onto to rest and breathe air. A long tank shape (rather than a tall one) gives more surface area and floor space, which is exactly what a newt uses most.

Keep the water cool

This is the part that makes or breaks newt keeping. Newts need cool water — room temperature or below — and you should never use a tropical aquarium heater. A warm tank is the leading cause of newt illness, so if anything, err on the cool side. Keep a thermometer in the tank so you can actually see the temperature, and keep the tank out of warm, sunny spots in your home. If your room runs warm, plan ahead for how you will keep the water down.

Water, filtration, and hides

Always fill the tank with dechlorinated water, since the chlorine in tap water is harmful to amphibians. A gentle sponge filter is ideal: it keeps the water clean without creating a strong current that would push your newt around. Add a few hides so your newt has places to feel safe and tucked away. Because a newt's skin absorbs everything around it, clean water is not just nice to have — it is essential to keeping your newt healthy.

A tight lid

Never underestimate a newt's climbing ability. They are surprisingly good at scaling glass and squeezing through gaps, so your tank needs a tight, secure lid. An escaped newt can dry out quickly and is very hard to find, so make the lid a first-day priority rather than an afterthought. Check that it seals fully all the way around.

Feeding

Newts are carnivores with small appetites. Good staple foods include bloodworms and small aquatic invertebrates, offered in modest amounts your newt can finish. Remove any uneaten food so it does not foul the water. Feed a varied menu of appropriately small prey and your newt will stay in good condition. Remember that newts are amphibians to observe rather than handle — their absorbent skin means hands stay out of the tank as much as possible.

Quick setup checklist

• A 10–20 gallon long tank, set up part water and part land
• A sloped shore or floating platform so your newt can climb out
• Cool water at room temperature or below — never a tropical heater — with a thermometer
• Dechlorinated water and a gentle sponge filter
• A few hides for security
• A tight, secure lid, because newts climb and escape
• Small carnivore foods like bloodworms and aquatic invertebrates

Newts are a favorite starter amphibian for older kids — see our roundup of the best newts for teens, or take our free pet quiz to find the right fit for your family.

🛒 Recommended supplies

Hand-picked gear for this guide. Affiliate links — we may earn a commission. The $/$$/$$$ badges are a rough budget guide, not live prices.

🧽 Cleaning & maintenance

The main job is regular water changes. Each week, use a gravel vacuum (siphon) to remove about 20–30% of the water along with waste from the bottom, then refill with fresh water treated with a dechlorinator so it is safe. Scrape algae off the glass as needed and rinse the filter media in old tank water — never tap water, which kills the good bacteria. Test the water so you can catch problems early. Never do a full strip-down that wipes out the filter bacteria; steady partial maintenance keeps the water stable and your newt healthy.

Cleaning supplies for this habitat. Affiliate links — we may earn a commission. The $/$$/$$$ badges are a rough budget guide, not live prices.

❓ Common questions