Rank: Guest 
|
Posted By Mike Doran
We have a large waterfall above a koi pond in a retail area. The water is only 'cleaned' via a large pressurised sand filter. Is this ok for controlling the bacteria?
Filter is backwashed weekly and although we monitor the temperature, due to being in a glassed area, it does rise above 20C in the summer.
Regards
B
|
|
|
|
|
|
Rank: Guest
|
Posted By holmezy
Mike,
As you probably know, legionella bugs need food and nice temp to proliferate. In order to cause us a problem we need to inhale via a spray or atomisation. Since your food supply will be plentiful in the pond, your best means of control would be temperature initially, then ensuring no spray is formed. Providing the temp doesnt pass 20 degrees, which is probably the bottom limit to allow bugs to proliferate, then you should be OK.
Fountains and waterfalls in ornamental ponds aren't reknowned for being a big legionella problem in my experience.
Holmezy
|
|
|
|
|
|
Rank: Guest
|
Posted By John Doa
Thanks for that, I just wondered whether the sand filter would be a reliable control measure as well as obviously cleanliness and temperature.
Thanks again
|
|
|
|
|
|
Rank: Guest
|
Posted By holmezy
Mike,
if you think about it, the sand filter will be acting as a big, ever replenishing food source for the bugs because its prime function is to capture organic material from the pond. If you can keep this at as low a temp as poss, ie well below 20 degs then you should be OK.
Could you incorporate a UV filter or something in the system that could kill bugs?
Holmezy
|
|
|
|
|
|
Rank: Guest
|
Posted By John Doa
Yeah, thought as much!
We are looking at the possibility of a standby chiller, backwashing every 2 days and the UV if the temp cannot be controlled. failing this, filling the whole thing with concrete and putting in a few potted plants - job done!!! ;0)
|
|
|
|
|
|
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.