Casbarian's
Neomeris vanbosseae CAN become become a nuisance, in high-nutrient (particularly with respect to the substarte) regimes, growing densely on hard substrate --and then they are very tough to remove --the anchorage to substrate can be pretty tenacious, and any remnant material can regenerate.
you'll know soon if your system is conducive to an unmanageable Neomeris presence, or whether, like MOST reef tanks, low nutrient levels, herbivorous attention and competition from other sesiles/benthics is keeping them in check.
They accrete calcium, yes, but it would take a considerable infestation to put a dent in a reef tank's Ca levels. thereby.
hth
Casbarian, can i use your photo of neomeris in an online article?
Your name (which you can shoot over via PM if you're willing) would be credited, marked directly onto the picture. The stickythread atop the forum on
Bryopsis includes one such credited photo (to Jim Bednar)
Anything else you want to know about
Neomeris?
horge