My suggestion for growing any macro is to have the refugium downstream of the calcium reactor, I found when I got my calcium reactor my chaetomorpha growth improved, likely due to the CO2 in the calcium reactor effluent.

I had it about 6 years ago and it still shows up in my overflow. I hate it. I clean it out of my overflow one a year. I can bring some if you want some.

I just grow frags in my sump now for nutrient take-up and ph stability.:wink:

Hmmmm,

Got 2 extremes, people love it or hate it. I wonder if my bioload is almost too low for good chaeto growth. I have a foxface, purple tang (neither full grown, probably about 5" each) as well as 2 ocellaris clowns in a 100gallon. The refugium intake is split with the skimmer so probably half gets skimmed before heading to the chaeto. I have a largish clump that's only doubled in size since say july or august.

See if anybody with a nice 5+ yr old SPS set-up actually likes it. I have a feeling that the only people that like have not had it for long.

Maybe I am wrong, but that is MO.