I'd suggest you crank up the aquatic plants, in batches. Say three
varieties at a time. That would be a convenient quantity to phase in
as parcels by mail order. When the pond, whatever size, or
configuration is planted about 60% area with aquatic plants, they will
take control of water quality, converting the surplus fertility the
algae exploits and converting it into attractive foliage, creating
shade, protection and additional sources of food for your fish.

.....Heres a short list of the better 'algae busters'

fast foliage plants- they grow fast but need restraining soon:
lizards tail
azolla (not hardy)
water hyacinth (not hardy)
parrots feather copes with fish grazing
typha's (reeds, the small varieties, not the nasty latifolia) copes
with fish grazing
salvinia (not hardy)
bladderwort

slow foliage types, easier to control in the long run:
aquatic iris... slow but steady growers, easy to control copes with
fish grazing
sedges copes with fish grazing
cyperus copes with fish grazing
scirpus copes with fish grazing
pickerel copes with fish grazing
sweet flag copes with fish grazing
any small to medium water lilies copes with fish grazing

The reason I'd categorise plants into two categories for algae busting
is that the 'slow' varieties are best in the long run, having more
attractive features and being well behaved and easy to control, while
you wait for varieties like that to take control, a combination of the
'fast foliage' types can be used to get control.... these are
extremely invasive plants but do have the redeeming feature that they
are fairly easy to control at a later date

One of the problems for new ponders is that 'green water' is a sudden
event and there is often the desperate attempt to go for the 'quick
fix' to hide embarrasement at all that work to make a pond going to
waste to end up with a green soup bowl.... which often results in
inneffective solutions like emptying, silly pumps and junk,
chemicals... The plain fact is green water is healthy water.... and
your fish are accellerating the process.

Cranking up the plants steadily will with time crush the algae, big
time, long term

Regards, Andy

http://www.members.aol.com/abdavisnc/swglist.html
(andys aquatic plant list for interesting swaps
------------------------oo------------------------

Michael Shaffer wrote in message ...
Hi, I have a 3000 gallon pond and the water was clear a couple days ago
now it's getting so I can't see the pump on the bottom. What can I do to
make it clear again? I have a 3600gph pump that recycles the water to my
veggie pond and stream. I also have 2 Koi and some water hyacinthe.

Thanks
Mike S