Hi You would like advise me. I think effect fed pole water in 25lts x 4 tank bacteria make u illness? I have problem 3time illness from work. Maybe germ for hand washer window cleaning inside and outside. Maybe effect weather I waste time off work for 1 to 2week. i have 5time off work for per yrs and my blood test all fine You have any problem been illness. We need to know find what wrong.