i called the singapore distributor David Phua and e cange my washer at the intake of the pump as the old washer jammed up the air intake but due to the low bio load, not much foam but at least it have foam coming up
thanks bro for all the advices .
i think i will pass on this little fellow to put in my small tank , i will try another attempt to put BT in my tank as my YT have started to be a greedy fellow