We know that GFO is effective at removing/ reducing PO4 levels, but if PO4 isn't an issue then it shouldn't be used. Right or wrong? Carbon....removes toxins, clears up water, deals with odor, etc. Should we only use this as needed? Or should this media be ran as a maintenance routine to prevent or decrease toxins. Just interested to hear how Triton uses these two media's or how they would recommend us to use them. For example, what are the indications for each media? When should we fire up the reactors?