Per your process I am through CP treatment and now have started GC in a new tank. I dosed the recommended amount of GC day one (2 packets for my 20L), then 48 hours later dosed again per the instructions (2 more packets). 40 hours later do a 25% water change. When you refer to 2 rounds of GC is this what you are recommending? or are you saying do this protocol over again? if so any recommendation on when to start the second round? Thx! Awesome Process!