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The bigger enclosures like the ones from ZenHabitats and DubiaRoaches.com ship flat and require assembly. It wouldn't take much to have a piece of clear acrylic cut to fit in place of the back panel.
Carolina Custom Cages offers front-opening terrariums that are clear on all sides if you'd rather not go the DIY route. They have a 4x2x2 that's the perfect size for an adult beardie here, although it's a lot pricier than the other options: https://www.amazon.com/dp/B0738L5GNR
Carolina Custom Cages Terrarium, Tall Extra-Long Deep 48Lx24Dx24H, Easy Assembly https://www.amazon.com/dp/B0738L5GNR/ref=cm_sw_r_cp_api_glt_fabc_C6DW2G5YCQS6C6F5QMJF?_encoding=UTF8&psc=1
Carolina Custom Cages Terrarium, Tall Extra-Long Deep 48Lx24Dx24H, Easy Assembly https://www.amazon.com/dp/B0738L5GNR/ref=cm_sw_r_cp_api_glt_fabc_6CMSRZZKYHWB1BX5FS2D?_encoding=UTF8&psc=1
That’s the cage. A water dragon would need something bigger in every direction.
I’ve set it up so as 25% of the cage is sealed off as a land section and the rest is water. Water dragon probably doesn’t need as high a % as water (the croc lizard spends about 75% of its time partially or fully in the water I’d say, including sleeping there).
These plants are awesome:
I bunched them together at the back in the shallow section, weighted by a rock and facing forward at an angle. Since then they have grown out and up, breaching the water and giving the lizard variable chill out depths and places to hide in the water.
I almost went custom but this Amazon find was hard to pass up. plus the setup was super simple.
Congrats on your first ackie!
The only problem is, as other people said, even 75 gallon is not nearly enough. First by size, second by weird dimensions(mostly narrow and tall) and also top access that prevents properly sealing and placing electrical equipment.
Minimum accepted size is 4x2x2 ft, which translates to 16 cubic feet, which translates to 120 gallons of volume. And normally larger enclosures are preferred.
Ideal and affordable solution requires building your own enclosure from plywood.
Less ideal is getting the following cage from Amazon and modifying it with more insulation material at the bottom and walls to preserve heat:
This is how mine looks assembled and occupied by tiny Pygmy mulga monitor: https://i.imgur.com/eyO308R.jpg
Just for your information. 4x2x2 is going to be cheaper to build with HomeDepot supplies like soy-based plywood, wood sealant, things of that nature.
If you can't build your own enclosure, you can buy Carolina Custom cage on Amazon. It is decent as a quick measure. I had to invest a lot to outfit it for a monitor lizard(tiny 8" Pygmy mulga monitor), but beardie shouldn't require that much or the fancy materials I used.
Here is the link to the cage, Yoshi definitely needs space!
This is how mine looks assembled and occupied: https://i.imgur.com/eyO308R.jpg
Carolina Custom Cages makes a 4x2x2 and a 4x1.5x1.5 that you can actually buy on Amazon.