have you removed the bio balls in the center chamber? if so you might need to add some live rock or something.thats along distance for water to cascade.
heres some pics of what your oceanic biocube 29(which is actually about 24 gallons before live rock,keep that in mind when dosing ,5gal can make a big differance)could look like after 10...
If the worms are red and come out during the day they are the one type of coral eating bristle worm called FIRE WORMS!
Any other bristle worms that are to skiddish to come out during the day or hide when you turn on the lights are probably good. As far as hair algea goes cut down on feeding...
I wish Iwould've gotten here sooner
I'm running ared sea prism skimmer w/a slight hood mod.
It is easier to acomodate than the tunze and has much better cleaning capacity Ive left my bio balls In for now and since the hood is the only piece I had to cut I could install w/ no prob. without...