almost forgot about the carbon question...........
it's a good idea to always run carbon in your system when you use O3.
O3 will convert Bromate in the tank to hypo-bromate which is a bleach the carbon removes this.
O3 + Br- -------> O2 + OBr- (BrO3-)
it also converts any iodine in your system to bleach as well, but the amount of iodine in your tank water is a very small percentage so it's not worth mentioning really.
i and allot of others do not but we do a good many large volume water changes. if it was more convienent for me to run carbon on my system I'd do it, it's just a PITA with my setup is the only reason i dont.
hth
kc
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