I need to buy some GFO and figured I'll give Bulk Reef supply a shot since I signed up for that group buy thing they did a whiles back but never ordered anything. Until now I've been using phosban but its not too cost efficient. Anyways they have three different types of GFO - which is best to use with a reactor? Also will buy some carbon - which is best to use in a canister filter ( for my turtles ) and a reactor ? I'd like to start running both at the same time instead of alternating.