70 Gallon Bearded Dragon Tank

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A 70 gallon bearded dragon tank can work for one adult if the floor is 48 inches long and 24 inches wide. That is the minimum UC Davis gives for a single adult. The trouble is that “70 gallon” is a label, not a shape.

Volume says nothing about how much floor the lizard gets.

This page covers one size only. The bearded dragon tank size guide compares them all. Everything below concerns Pogona vitticeps unless another species is named.

What “70 gallon” actually measures

Aqueon lists standard glass tanks at 55, 60, 65, 75, 90, 125 and 150 gallons, with no 70. Its sizing sheet gives a 75 gallon tank as 48.5 x 18.5 x 21.125 inches (123 x 47 x 54 cm). A 70 gallon model from that maker does not exist.

One custom builder sells a “70 Gallon Glass Paludarium” at 48 x 24 x 30 inches (122 x 61 x 76 cm). That footprint suits a dragon, but the label counts only the water section. The maker rates it at 68 actual gallons to a 15 inch waterline, while the full 48 x 24 x 30 inch box holds about 150 gallons by simple arithmetic.

Treat the “70” as a name and check the inches.

Other listings may simply be a 75 gallon footprint under another name. Ignore the gallon figure and measure length, width and height. A tank of 48.5 x 18.5 inches is a 75 gallon footprint, and the 75 gallon page covers it.

Centimeter values are converted from the published inches. No mainstream maker page for a standard 70 gallon glass tank was found, so no other sizes are listed.

What the sources say a dragon needs

The published minimums do not agree, and they use different logic. Some tie the size to the lizard, others give a fixed box. The table sets them side by side, quoted as each source states them.

The NSW manual adds that height for a terrestrial lizard should be the larger of twice the head and body length or 40 cm (about 16 inches). It also states that it is impossible to provide too large an enclosure. That line matters most when you are choosing between 70 gallons and something bigger.

NC State gives the smallest figure, 20 to 40 gallons, and it sits far below the others. UC Davis names 75 or 120 gallon aquariums for a single adult. That gap is why a 70 gallon tank should be judged by its footprint, not its label.

Which ages a 70 gallon tank suits

Under the WSU rule of three times body length, a 48 inch floor covers a dragon up to 16 inches long. NC State puts adult length at 15 to 20 inches. The low end of that range fits and the high end does not.

Height also decides fit. A 75 gallon tank is 21 inches tall, which clears the 18 inch UC Davis figure and the 16 inch NSW figure. The 30 inch design leaves room for a basking platform under a UVB fixture.

WSU notes that a large enclosure for a small juvenile may need artificial partitioning to reduce stress. A partition that keeps both the basking and cool zones is a practical answer. Remove it as the lizard grows.

The 50 gallon page covers the smaller alternative for young animals.

Verdict on the 70 gallon bearded dragon tank

A 48 x 24 inch floor makes a sound permanent home for one adult by the stated veterinary minimums. A 48 x 19 inch floor suits a juvenile or subadult well and an adult only barely. Both lengths, 48 inches or 122 cm, sit right at the NSW ideal of 120 cm.

If the choice is open, width is worth more than gallon count. For more room, the 80 gallon page covers the next size up.

The 150 gallon page covers the largest common option.

How to set it up

Put the heat at one end and leave the other end cool. The NSW manual asks for a basking spot of 35 to 40 C (95 to 104 F). Its cooler areas run 20 to 29 C (68 to 84 F).

WSU gives 95 to 110 F for basking and 75 to 80 F for the cool zone. LafeberVet lists the preferred zone as 25 to 40 C (77 to 104 F).

Merck advises heaters that are thermostat controlled, screened from the animal and set at one end. A dimming or pulse proportional thermostat is the usual way to hold a basking lamp steady. Guard every heat source and avoid hot rocks, which Merck says frequently cause burns.

For light, the sources give different distances. Merck says under 30 cm (12 inches) from the reptile. UC Davis says within 12 inches of the basking site, and NSW says no more than 300 mm.

WSU says 30 to 45 cm above the basking area.

Mount the tube inside the tank over the basking half, since WSU warns that glass or mesh blocks UVB. A T5 high output desert UVB tube is a common choice. Replacement intervals differ: NSW says about 12 months, NC State says 6 months, and WSU says 6 to 8 months for juveniles and yearly for adults.

NSW recommends 10 to 12 hours of light in summer and about 4 to 6 in winter. Adults need no extra night heat if the room stays above 16 C (61 F), while hatchlings can need up to 27 C. The enclosure guide covers the full setup.

Read the gradient with a thermometer at each end. WSU asks for two hiding areas, one warm and one cool. The deep heat projector page covers one alternative heat source.

Glass, PVC or front opening

Merck states that glass is a poor insulator and heat loss may cause dramatic temperature swings. It lists wood, plastic and fiberglass as better, though costlier. A glass aquarium with a screen top is the usual 70 gallon bearded dragon tank build, and it needs more heat in a cool room.

Merck also warns that reducing ventilation to hold heat is ill advised and frequently causes skin and respiratory disease. That applies to PVC boxes with small vents and glass tanks with covered tops.

A front opening door lets you reach the lizard from the side instead of from above. This is practical guidance, not a sourced fact. Cost and insulation are the real trade, so pick the material that holds your gradient.

When to upgrade

Upgrade a 70 gallon bearded dragon tank when the dragon is longer than a third of the floor, which is the WSU rule read backward. On a 48 inch floor that means about 16 inches of total length. A larger floor is also worth it if the dish, hides and ramp crowd the floor.

The water quality page covers the dish. NSW states it is impossible to provide too large an enclosure, so upgrading carries little risk.

Frequently Asked Questions

Is a 70 gallon bearded dragon tank big enough for an adult?

It is when the floor is 48 x 24 inches, matching the UC Davis minimum for a single adult. A 48 x 19 inch footprint is 5 inches too narrow. Check the inches, not the label.

Does anyone make a standard 70 gallon glass aquarium?

Aqueon does not list one; its range runs from 65 to 75 to 90 gallons. A custom maker sells a 48 x 24 x 30 inch paludarium under the 70 gallon name. Ask for measured length, width and height before buying.

What is the shortest floor length that suits an adult?

UC Davis gives 48 inches and NSW calls 120 cm (about 47 inches) ideal for one or two adults. WSU asks for three times body length, so a 20 inch dragon needs 60 inches. A longer lizard outgrows a 48 inch floor.

Can a juvenile live in a 70 gallon tank?

Yes, since the size exceeds every juvenile minimum found. WSU says a large enclosure for a small juvenile may need artificial partitioning to reduce stress. Remove the partition as it grows.

Should the UVB tube go inside the tank?

Yes, because WSU warns that glass or mesh between the lamp and the lizard blocks UVB. Sources put it 30 cm to 45 cm above the basking area.

Do I need a thermostat on a tank this size?

Merck states that heaters should be thermostat controlled and screened from the animal. A tall 30 inch tank loses more heat to the room, so control matters more, not less.