Over time your colony will burn through some of the resources or you will not be able to acquire them easily anymore. With aid comes a group of objects that turns one product into another, often using an extra mineral. The simplest example, though it requires researching certain technologies, is the water purifier. It allows you to use 1kg of sand to purify 5kg of contaminated water and get the same amount of clean water. This machine only requires access to electricity and two pipes. One brings in contaminated water and the other pumps out the pure product. As long as you have sand, you are able to provide yourself with a large supply of pure water. The compost is another useful place, where you will produce fertilizer from contaminated dirt. As long as fertilizer is readily available, the more important role is as a means of disposing of the by-products from your outhouses. Because of this, the fertilizer maker is completely unnecessary, especially since it creates fertilizer from contaminated water, which it is better to purify instead.
The bio distiller is another essential item that you need in your base, especially if you depend on the production of oxygen with algae. This machine uses slime and electricity to produce algae and contaminated water. You will need pipes to drain the liquid, while the algae will lie on the floor until you pick it up. It is a good idea to build a closed room for slime, since it produces contaminated oxygen (even if you store it in a storage compactor). The distiller itself also emits contaminated oxygen, is ugly and increases the heat in the environment. It is best to put it away from the base, preferably in an isolated room. Duplicates can still breathe in it, so there is no need to pump in pure oxygen into it. Slime can be obtained mainly in the toxic biome, but in enormous quantities. To keep the pace of production at the right level, construct more than one distiller. Although it does depend on the size of your crew and the number of devices emitting oxygen using algae.