"DK" wrote in message
...
Hi there Stephen & Koi-Lo,

Thanks so much for your enlightening feedback. I did forget to mention
that
I have some koi in my pond which have grown quite a bit ......about 7 to 8
inches now from about 3 to 4 inches 2 months ago. They are thriving quite
well right ? Can it be that the substantial presence of the algae has
contributed to the favourable growth rate ?

It may have. They koi and their fry are growing the fastest in my 800g pond
with this floating "stuff." I don't see them eat it but it may be adding
something helpful to their diet - insects of some kind perhaps. We have no
idea since all the tubs and ponds are treated the same.

A couple of doubts still not cleared however...... should I just leave the
fuzzy algae alone doing its appearing & disappearing job or should I
continue netting it out every afternoon?

That's entirely up to you. I gave up trying to net it out. It's harmless to
ignore it.

It's really frustrating as it just
can never end , day in & day out ! Another thing is about the submersible
pump, do you think it is undersized for sufficient circulation? Remember I
said that the water is crystal clear and only the walls & floor are
blanketed by about half inch of algae.

Then it's probably adequate. I don't go by the horsepower of the pump's
motor. We don't even remember how many GPH our large Big Versa pumps. That
one is on the 2000g pond. I've got an 800 or 900 gph on the smaller pond
with a 500gph running for oxygenation and circulation. For the 680g
propagation tanks behind the house we have an assortment of water pumps,
from 500 gph to 900 gph.
--
KL....
Frugal ponding since 1995.
My Pond & Aquarium Pages:
http://tinyurl.com/9do58
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