If there is no polution in air, having cleaners turned on in itself creates polution (cleaning polluted water). Would it be more sensible to count used up polution as a resource too to craft poluted water. As it is now I'm making bricks basicly from electricity, as there is no polution in air to capture and therefore convert to poluted water > solid polution > Stone bricks

If that's possible, I would have expected the original mod maker to have set it up that way. I don't think I can stress how little I know about mod making, but I can read text files and copy/paste as necessary. What you're proposing would require knowledge of how to get the building to detect the amount of pollution around it. This mod is very simple where the building just has a negative pollution value while also having some output for the crafting recipe.