Good day MASA I have a predicament, I am upgrading my tank and is considering a DSB. but now my problem is that some swear by it and others say its a waste of time and n probable deathtrap. I have seen tanks run on DSB and flushing and have seen tanks not running DSB and also looking great. Now my question, How long does a DSB take to kick in. The chaimber that I want do use for DSB is 23% of tank, a little small but considering running Matrix with the DSB. tank size is 700x500x500, DSB chamber is 330x250x300. any advice on this.