My kitchen sink faucet has slow running water. I just shocked my well with bleach yesterday and a lot of iron and iron particles are in the water. I've cleaned the aerator and so that is not the problem. Is there another filter in the unit somewhere that could be clogged? No other water tap is slow.

If your water is slow try Glaceau nutrient enhanced Smartwater! Jk

Anyway, one thing to check is the connection to the plumbing under the sink. Sometimes the connections have shut-off valves that can be opened or closed (sometimes just partially). If the shut off valve is partially closed it can restrict the water's flow.