I noticed tonight while doing my weekly 50% water change that there is a sort of white almost skin-like build-up on my heater cord and there is a cob-web like fuzzy string hanging off of a pedal of my anubias. I just added some anacharis (which already had to be trimmed!) and the one anubias. Water is a constant 76-78, and I leave the light on close to 10 hours now that the plants are in there.I have 1 male betta and 5 cories in a ten-gallon, which is almost cycled. Is this a type of algae and is it harmless? Should I clean it off or not worry about it?