More light can help it.
Also, 6700K is better than 14000K.


"RJAG" wrote in message
...
a couple of months ago i bought a bunch of calerpa on a small piece of live
rock and it doesnt seem to be growing any. i have it in the second chamber
of my sump with a single powerglo 14000K tube running 24/7. i did a
cutting and placed it in the main tank but my yellow tang made short work
of that. i see others having to trim their calerpa because its growing like
a weed and taking over the sump.
I'm not so lucky. i have a RIO 1700 return pump so the water flow isnt
too high on a 40G tank but i do have a Aqua medic SL1000 Multi skimmer in
the sumps last chamber.
other algae is flourishing so why isnt this?

R