You want to use aprox 1 tablespoon of GFO
for every 10g in your system. Test your phosphate before you add the GFO
, then test in about 1 week, wait another week and test again. Your phosphate should now be down low enough where the test kit doesn't detect any. At this point change the GFO
and then change it every 6-8 weeks.
For best results GFO
should be run in a reactor like this
. You can also put it in a media bag and place in a high flow area in your sump, but it doesn't work nearly as good like that as it does in the reactor.