The crafting recipe for the Arcane Spa, as shown in the Thaumonomicon. Please note and excuse the use of a texture pack.
The Arcane Spa is both a research option under the Alchemy tab that can be unlocked with 3 levels of experience, but also a block that can be used to pump substances, supplied either manually or by other, automatic means, into a 5x5x1 area above it. This means it will fill a one block deep square of 5 blocks to each side. This is especially useful for creating obsidian farms, or for, as its main purpose is described, to easily create pools of Purifying Fluid that can help to relieve the effects of Warp and to temporarily protect against them. The GUI inside the Arcane Spa has one input area where Purifying Bath Salts or any bucket of liquid can be placed, and a small button that allows the mixing of the Bath Salts, if put in, into water if it is present. There is also a meter showing the currently contained fluid and how much of which is present, measured in mb, or milliblocks, 1000 being a single bucket full of that fluid. The Arcane Spa can be crafted at an Arcane Workbench with 2 blocks of quartz in the top left and right corners, 4 Arcane Stone Bricks in the middle and lower right and left sections, a Brass Gear in the bottom middle section, a Warded Jar in the center, and iron bars in the top middle section, along with 25 Aqua and 15 Terra and Ordo Vis.