Hi,
I was there diving my inspiration last april.
Puerto del Carmen is absolutely fantastic. You get ready in the harbor, then you walk 20 mtrs, go down throught the stairs, hit the water, go -6 mtrs down, start diving, go down, down, down down..... and then... up, up, up and lay in the sand in -6 mtrs, make the last deco, go to your car, leave everything there, go to the bar and take your beer. JUST FANTASTIC.
I went to -83 mtrs and the wall goes deeper....
I went with Marina Rubicon Dive Centre in Playa Blanca. The name of the owner is Cris M. He is here (Rebreather World).
Enjoy your time there.
Best
Mikel