I get what you saying and i once used to think same but then i learnt he saying his experiences and his opinions on why he thinks its bad and some may think that means advises to not qt but its just him saying his experiences and opinions and i seen him state many times he advises noobs to qt,but anyway i not his dad and dont need speak for him.he's a big boy and i need do a water change ^_^please reread what I said. Paul actively advises against qt. Almost all others in this thread admit the risk.