First of all: I don`t think Erolfa is worth the high price at all. So IMO don`t worry about it. ( It does smell good of course, but it`s nothing special)
Hmm...I know this might sound grazy, but how about Xeryus Rouge...To me it smells like sweet, red-coloured ocean. (With fruits and spices floating on the surface)
I recommend everyone to try Harley-Davidson Free Space. Give it a chance and you find something similar to Coolwater, but more sweet and sensual with gourmand touch. It`s great aquatic/blue fragrance.