Completely agree. Found a tiny sprig of cualerpa growing on a rock a few months back, immediatly ripped it out and scrubbed the spot and long story short it completely overtook the tank. took a complete tank overhaul and the addition of a one spot foxface and now I am happily cualerpa free. Never ever will have cualerpa anywhere near my tank again. Now cualerpa Prolifera I may try in my anenome/macro/mangrove lagoon tank because I don't care if its overun.
Yeah it is the salt water version of duck weed. It works but the issues don’t justify the results..