My hair is fine/low porosity, too. It NEVER tangles, so it may be something you're doing. My hair just HATES baking soda. It makes it dry and hard.

Can't advise you on products. My hair prefers the products from the online, boutique type companies. In most cases, you use a small amount and a little goes a long way--so they can be quite cost effective.

My hair doesn't care for chemicals, especially polyquats. They give me frizz when wet. I've been told that it's not buildup, but it needs a stronger surfactant to remove them. You may want to read ingredients and try to stay away from most of the chemicals.

Last of all, there's an acronym sticky at the top of the General Hair Forum. That should help you when reading the posts on nc.com.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08

SE PA

HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic (now Hello Curly Curl Stimulater); Botanical Spirits Jellies, CJ Repair Me, Aloe Fix and CCCC