Just made the simplest UAS in the back of my de-rimmed Nanocube 28. I read that chaeto would just wash away in the back overflow chamber so I decided and think it is a better idea to put a UAS. I ruffed up the screen and am using a 5 watt led grow light. I am getting patches of dark green. The photos are of 2 weeks growth. When should I scrape some off?

Click image for larger version

Name:	IMAG0201.jpg
Views:	602
Size:	36.0 KB
ID:	6278

Click image for larger version

Name:	IMAG0241.jpg
Views:	661
Size:	40.2 KB
ID:	6279

Click image for larger version

Name:	IMAG0222.jpg
Views:	583
Size:	40.9 KB
ID:	6280