A pool inside a Planet Zoo 2 habitat gives animals somewhere to drink and swim, but water does not drop in as a prefab object. You dig the basin yourself with the terrain tools, pour water to the depth you want, then connect a pump so it stays clean enough to drink. The whole process runs through the Terrain menu and the Facilities menu on the lower interface bar.
Quick answer: Open Terrain → Sculpting, use the Push tool to dig a hole, switch to the Water tool and click inside the hole at the depth you want, then place a Water Pump ($500.00) over the pool and connect its node to a water filter.
Dig the basin with the Sculpting tools
Water only sits where the ground is lower than the surrounding terrain, so the first job is to carve a depression inside the habitat. Everything here happens in the Sculpting tab of the Terrain tool.

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With the basin dug, the Water tool handles the actual filling. The highlighted area inside the depression shows the exact height the water will reach before you commit.

A steep incline can leave animals unable to get into the water. Use Gradient: Push to smooth the shoreline and make the pool accessible, rather than merely decorative.
Keep the water clean with a Water Pump
Standing water in a habitat raises disease risk unless it is filtered. A Water Pump placed over the pool and wired into a filtration network keeps the water clean and safe for animals to drink.

Confirm the pool is working
The pool is finished when the water fills to the level you set, the banks slope gently into it, and the pump reports a valid connection to a filter rather than a “No Connected Water Filter” warning. At that point the water reads as clean, and animals can both drink from it and use it as part of their space.
Water surface area and water depth both count toward a habitat’s space, so a well-shaped pool does double duty by meeting drinking needs and expanding the usable environment. Check individual species’ requirements in the Zoopedia to size the depth and slope correctly for the animals you plan to house.







