[0sprey]

for point # 14, an existing tank with fish (hosts) will be ich free after about 11 months as long as no new strains of ich are introduced (ie. New fish, corals or outside sources of sw) this is believed to occur through a mutation of the parasite itself, it basically becomes so "inbred" it can no longer survive.

Point #10 refers to a fallow tank with no fish (no hosts for the ich parasite), which after around 8 weeks without a host the parasite can no longer survive.

+1