Ok use 1/2 and soak them in ro water. Got it! I'm going to stop running gfo ! But what about carbon should I keep ruining it and changing it every two weeks? said:Yes keep running carbon as usual, the BP's won't offset the value provided from carbon.
You may want to continue running GFO for a while though. THe BP's are not going to instantly start producing for you, will take some time. Keep the GFO going for a good 3-6 months.