"Andymcgoo" wrote in message
. ..
Please can you help, I have had a problem for about 6 weeks now. I have
got a small pond and I have had a lot of trouble with fish not surviving
in the water. I have had the water tested for the usual PH and nitrate
problems all coming back ok.

If it's a new pond, and you put fish (how many? what
kind? what size? etc etc) into it right away, it could
well be an ammonia problem. You didn't mention
testing for that.

I have emptied the pond scrubbed the liner and refilled.

Scrubbing the liner generally means killing any
useful algae that might have formed.

This time I changed the water circulation so I have several fine jets of
water from my pump back into the pond to get more oxygen into the water.

Maybe that's stressing the fish (already stressed
from (1) new situation, (2) likely high ammonia)?
You didn't mention how large your pond is.
For some, a "small" pond is about the same size
as a large hot tub. For others, a small pond is
about the size of half a whiskey barrel (or smaller).

This time I have not stocked the pond or put any plants into it I plan to
do this after a week or so. My problem is that after 2 days a layer of
white film has formed over the bottom of the pond all over the liner.

Could be bacterial bloom? I'm familiar with those
in aquariums; don't know if ponds get them, too.
You mention (below) very hard water. The "white
film" could maybe be a mineral deposit and unlikely
to be harmful. Although fish (whichever kind you
have) might not like too hard water.

I live in
north Kent and we have very hard water. I do not know what the film is or
if it is safe for fish. We have not sprayed or fed any plants I have
talked to southern water who are not interested because it is a pond and
not domestic water supply. Have you got any ideas?

I would definitely put the plants in first, let things
settle a bit, test for ammonia, add fish *gradually*.
Small fish, like really small goldfish or minnows,
if you can get them.

Gail
near San Antonio TX USA