My chaeto seems to be coming apart and little strands keep coming loose from the main clump and shooting out into the main display. Its all over the place and it did [B]not [/B]do this for the first few months I had it. I have 2 submersible halogen bulbs. The chaeto has been happy since last summer and then about a couple weeks ago it started doing this. It was originally a fist size clump that grew to 2 fists but now it seems a bit smaller. Perhaps the bulbs are getting old? Nitrates have been around 10 for months.