I've had mine for about four months (?, there abouts), but it isn't that long tentacle variety. It's got short stems with puple skirt that almmost looks like tiny buttons rather than the skirt seen on the long tentacle variety. I probably have the easy one to maintain. My daughter had one that continuously receeded in a stop and go fashion.

I have a question to the "dirty water" comment. What is dirty water? Is it water with a high amount of particulate matter in the water column or is it water with other than 0 chemical readings? Or is it with high phosphates? No skimming?

My water column, although not inundated, seems to have its fair share of particulate matter that floats about. I'm interested in the welfare of the other occupants as well so you can understand (I hope) my desire for clean water as opposed to dirty.