Regular hammer is a broad term for a hammer coral. There is a lot of different corals a hammer can be but the most common is a green tip hammer coral. Which I assume you are meaning the standard hammer. A splattered hammer coral will have green and purple tips on the tenclaes.
Bring down your alk. Slowly as you have already shocked your corals with the big jump. My experience you don't want to jump or go down more the 1.0 per week which is already a big jump