"DK" wrote in message
...
Hi all,
Have a problem now & hope to get some useful feedback and expert advice
from
you guys out
there.
I have a two-month old concrete pond of approx 1500 gallons volume
complete
with a 0.5 hp submersible pump, external filter, a biological filter & a
waterfall. To curb an initial pea soup problem, I have added an 18W UV
sterilizer run by a separately dedicated small pump and the water is now
crystal clear except that the walls & floor are carpeted with green &
browbn
algae. However, I believe that the system has sort of settled as these
days
I only have to monitor & change the filters as and when necessary.
That's great. The algae on the sides and bottom is normal.
I live in a tropical country and have no trees or shade overhanging the
pond, thus exposing it to about 6 to 8 hours of strong sunlight on an
average day. I have added quite a bit of aquatic plants and shrubs in &
around the pond and hopefully this could help improve the balance.
One problem that I face now is the emergence of numerous free-floating
clumps of green algae every afternoon (after strong sunlight) which I
would
scoop out manually using a net on a long pole. It is very irritating but
strangely, if left alone these clumps of algae seem to disappear by
nightfall. Beats me. What are these actually ?
My 800g pond has the same problem. I've given up netting it out. Most goes
through the net anyway. It's a type of algae.
Are they called algae scum
(read it somewhere) and how do they come about ?
They're fed by nutrients in the water. I added more plants as competition
but that didn't help in my pond. Water hyacinth and lettuce may help but
then I have to constantly net out the excess. A real pain in netted ponds.
Are there anyone out there
who have experienced the same predicament & how did you deal with it ? The
filter of the UV filter gets clogged up very quickly too. Wonder if the
reason could be the size of the pump or something else.
I enclose the water pumps in those black screen plastic pond plant baskets
wired together. They don't clog for weeks. My Tetra UV lights don't have a
filter attached. Water changes don't help in my pond, they just make the
problem worse. I've learned to live with it.
Appreciate any feedback.
Thanks & regards,
Danny
--
KL....
Frugal ponding since 1995.
My Pond & Aquarium Pages:
http://tinyurl.com/9do58
~~~~ }((((* ~~~ }{{{{(ö ~~~~ }((((({*