I see from the hair bio thread that your hair is 2b with 2c &3a, coarse, medium porosity, and thick. And, you have very hard water.
For hard water, the best plan is to install either a whole house water softener in the basement or to install a shower filter (screws right into the shower head). This removes the minerals before they get to your head.
The next best plan is to remove the minerals from your hair. You need a product with cheleating agents like EDTA. Citric acid is also good. Apple cider vinegar (diluted in water) rinses also help remove minerals. Shampoos marketed as swimmers shampoos and hard water shampoos remove hard water build up. Almost all of them have sulfates. There is one VO5 conditioner (used as a cowash) that has EDTA high on the label (can't remember which one). Curl Junkie Daily Fix is a cleansing conditioner (in between a cowash and a low poo) with EDTA and citric acid.
Dealing with Damage Done to Your Hair by…Water? | NaturallyCurly.com
Since your hair is coarse and is medium porosity (and sounds like it may even be low porosity), you will want little to no protein. You may want to use some protein on a rare occasion, but in general, you should avoid it. Coarse hair tends to like oils and butters and the products that contain them. For a rinse out, try Garnier Fructice triple nutrition (GFTN), aubrey organics honeysuckle and rose (AOHR, very strong scent), or Darcy's Botanicals Pumpkin (can't remember the exact name). Curl junkie also has several conditioners that fit the bill.
For a cowash try any of the VO5, white rain or suave naturals except for suave naturals coconut (has protein).
If you want to try some of the boutique brands (curl junkie, spiral solutions, darcy's botanicals, etc.) Kathymack sells samples. Click on the fotki in her siggi.
http://pedaheh.blogspot.com/ (a blog to help new wavies, go to the how do I get started page)
2a (nc.com) 2bFi (Fia), very fine, thin, low/normal elasticity, porous, CG, doesn't get weighed down
Cowash: Tresemme naturals
Rinse out/leave in: Renpure Organics (red)
Curl enhancer: FSG
Gel: BRHG, Salon care aloe, Ecostyler Krystal (normal dews)
PT: ION effective care, IAgirl's gelatin PT
Low Poo: renpure (red), Ion swimmers