just a reminder for those of you with 12mm droppers. I use mine every week to help clean the tank. I have tubing that fits snuggly on the pointed end, remove the bulb, and I just start a siphon and it gives me a good tool to clean around corals and rocks where my normal siphon hosing or tank cleaning tool can not reach. It works fairly well for removing hair algae as well as some others.
when I got the dreaded cotton candy algae that came on some frags it was absolutely priceles for removing it around zoanthid colonies. I know I've mentioned this method before but the thread has gotten quite long and I thought I'd bring it up again.