used to run in 24/7 in reactor, changed religiously every month, for 3 years.
Did not have any algae, ZERO.
9 month ago tried Zeo, it did not work out lost too many corals mostly SPS obviously.Tank grown full of Red Hair Algae !
But continued to run GFO for 24/7 and changed every month. I could not even make a dent in the RHA even though i had sea hare and abalone chomping the staff lake there is no tomorrow.
Any how now i DO NOT run any GFO at all just carbon.
For phosphates control i use CaribSea "
PhosBusterPro" and
Ultra AlgeaX,now i got no hair Algea of any kind.
Interesting side effect for those who wants fight Hair Algea and has flat worms....when i used CaribSea PhosBuster at recommended dose in my 6 Gal Nano it wiped out almost all flat worms !!! i repeated this and now have no flat worm at all.
I don't know if this Is a coincidence or what but nothing was changed in the 6 Gal Nano, not even water change.
So after that i decided to get it a "GO" for my 60 gal reef. it only helped a little with Hair Algea, i did Not have flat worms in the reef so cant say that it worked twice in terms of flat worms elimination, BUT it wiped almost all of the pods in my sump
i can hardly see one copipod and two amphipods there and have to look for a few minutes to see one.
"UltraAlgeaX" works for Hair Algea control too and i can say a little better then anything else, the only thing is that it make skimmer foam like crazy.
having said all that i no longer run GFO.
So No i choose not to.
thx.