Detroit will for sure have chloramine in their water. No need to buy an air pump if you don't have one. I use it because I have a shit load of molasses and if it isn't bubbled it will ferment just sitting there .... but as NickNasty pointed out above humic acid will work just fine. Pretty much any organic material will bind chloramine. Compost, ewc, alfalfa meal, etc.
Stomp, a good replacement for dolo lime is oyster shell flour. It works great, but you will most likely have to order it online. Another good replacement can be found at Home Depot. Pick up a package of "Lily Miller Super Sweet" calcium carbonate, and a package of garden Gyspum (calcium sulfate). You will use that at a 2:1 ratio calcium carbonate to calcium sulfate. This can be applied to your medium at between 1/2 cup to 1 cup per cubic foot depending on how acidic your soil is. It takes a while to become bio available so it's best to add it to your soil while it's sitting for x weeks prior to plugging a clone in there.