water tanks 3D model is available on CGTrader for $18. Original author: Victoriasentius.
BLEND (Blender, filesize: 739 KB), OBJ (OBJ, filesize: 419 KB), FBX (Autodesk FBX, filesize: 713 KB), GLTF (glTF, filesize: 442 KB), PLY (Ply, filesize: 335 KB), STL (Stereolithography, filesize: 464 KB)