Carbon or not ?

[reeferious]

have been user of chemipure for god knows how far back. came into possession of some bulk carbon from brad(untamed) and ian of chem master. question is i've always purposely underfiltrate (physically and chemically) my tank which has app. 200 gal total volume yea i was using 1 pack chemipure good for 40 gal and replacing this every 3 months. very interested to know how much of this carbon i should be using starting out, replacement frequency and whether i should be using it continuously 24/7 the way i am using chemilpure. mixed sps, lps, softy tank with some honking huge leathers on bottom. water change 25 gals biweekly.l