Hi Grandpa John,

You might have too many fish in your pond.
Goldfish will do a fine job of eating mosquito larvae. You can catch your
excess fish with a minnow trap.
I'll post the algae tips for you:

Algae fighting tips
~ Nutrients for all forms of algae are sun, new water, fish waste, fertilized
run off, rotting plants, blown in dirt.
~ New ponds and spring ponds need time for plants to get established, algae is
quicker at getting going.
~ add plants, of any kind, in the pond. Especially underwater plants.
~ Shade is good - provided by lily pads, floating plants or artificial shade
for part of the day.
~ LOW fish stocking (20 gallons per goldfish, 100 per koi after starting with
1,000 gallons) and *not* overfeeding the fish. Too many fish and too much
feeding is probably responsible for most pea soup water, followed closely by
too much decaying plant matter, sludge and overall gunk in the water
~ clean up dead plant matter and screen for falling leaves in the fall. Clean
out pond once a year.
~ building ponds with bottom drains and skimmers.
~ do not use algaecides, they only make lots of suddenly dead algae and that
will feed the next algae bloom.
~ do not use products to dye to the water...
~ do not worry about algae that grows on things (substrate algae) this is good
for a pond
~ gently remove string algae
~ build a veggie filter* see below
~ water movement and occasional water changes of 10%
~ add a sludge consumer, concentrated bacteria.
many rec.ponders use http://www.united-tech.com/m-aq4u-toc.html
~ Check your pH, too high, over 8.8, or too low, under 6.4, and most higher
plant forms can't take up the nutrients.
~ UV lights work on suspended algae (green water) - does cost some $$.
~ adding a combination mechanical and biological filter to screen gunk and
convert fishy ammonia waste for fish health.
~ patience, more patience and time ;-)



*Veggie filter ~ running the pond's water through plants
- as easy as floating water hyacinth in top of a stock tank and planting
watercress in your waterfall (my method ;-)
or
read Ingrid's post on plant filters:
"The essence of a plant filter is a water proof container with the water from
the pond
being pumped in one end flowing thru the roots of various plants and flowing
back
into the pond at the other end.
It needs to be long enough that solids settle to the bottom OR have filter
material
that will slow or hold the solids (and get rinsed out periodically).
It needs plants of different kinds to maximize removal of all wastes.
it needs sufficient amount of plants to remove in one day all the wastes
produced by
the fish load in one day. It needs plants with extensive roots and/or plants
that get big so they used up more
nutrients. It needs to be only 8-12" deep so it doesnt go anaerobic."
or go he
http://www.iheartmypond.com/Design/D...rs/default.asp

kathy :-)
A HREF="http://www.onceuponapond.com/"Once upon a pond/A