Wow great feed back - I think if it ain't broke don't fix it - is the way I like to go. I am a little worried that as the reef grows and the fish grow to full size that bioload will increase.

So having a well established refugium and gfo/carbon will it keep up with the bio-load? Would adding more dry rock to the sump and or dt help?

the 180 is now 2yrs old (was started from my 2yrs 75 gal)

thanks every one for the feed back - glad I asked before purchasing.

Your refugium probably won't help with nutrient export unless you modify it to just grow Chaeto. Adding more rock would help by creating more areas for denitrifying bacteria to help reduce nitrate by offgassing, but the difference would be minimal.

myka thanks for the info.

my refugium has a huge ball of chaeto - it takes up 3/4 of the 20 gal refugium