So my cubes been running for 13 days ( incl today) and iv got quite a bit of Aglae growing all over. Its hairy and brown...is it good or bad? Also is it time to add a CUC ( clean up crew ) to the mix now? Iv also got a small nenny growing...its got a white base and light brown tentacles. Just popped outa nowhere. Good or bad? My tanks volume is 450l....but with all the density its now about 275l. So in saying that....how many hermits and snails should I add? Here are the long webby snotty strands that iv seen grow in a few cycling marine aquariums. Sorry but by the time I got the camera ready they floated to the surface and clumped together.