On May 11, 9:57 am, ~ jan wrote:
On Thu, 10 May 2007 06:32:32 CST, John
wrote:

Just found 2 dead goldfish in my pond - black discolouring on their
undersides.
Can anyone help diagnose and say whether I need to do anything to the
pond please?

Sick Fish or Sick Pond Form

Please describe your problem, including fish characteristics, like;
whirling, flashing, gasping at surface, wounds, etc.:

Pond Size in Gallons? (litres*.26=US Gallons): 250 GALLONS

Water Source (Well, Irrigation, City?) CITY - SOME FLUORIDE
If City how is water treated?: =

Time in Operation? 6 YEARS BUT TOPPED UP FREQUENTLY
(How old is the pond/water?):

Liner type? (EPDM,PVC,RUBBER,Cement/Concrete etc): RUBBER

Fish Population?
Type? Size? QTY, Time in Pond: GOLDFISH - ONLY 4 OR 5 - NOW 2 OR 3

Food? Type and Frequency of feedings.: PELLETS USUALLY DAILY BUT FEW DAYS MISSED DUE TO ABSENCE

Pump Type, IN/OUT of pond, GPH etc NONE
(Describe your filtration system as well as possible):

Prefilter media type? Last cleaned?: NONE

Filter is BIO or Mechanical? Last cleaned? How?: NONE

Carbon added? How much? When last changed?: NO

Aeration? Waterfalls? Bubblers? NO
Venturies?:

Water Temp? 60f

pH?: unknown

KH?:

Ammonia (ppm or mg/l):

Nitrite (ppm or mg/l):

Nitrate (ppm or mg/l):

Water Color, cloudiness, odor?: cloudy

Water changes? (% of pond volume and how often): TOP UP MONTHLY

Additives used (water conditioners etc): CONDITIONER OCCASIONALLY

Tests done by self or another?: NONE

Weather (what's it been like lately?): WARM (70F) UNTIL WEEK BEFORE THEY DIED THEN 60F

Medications used?: NO

What Zone or Country of residence?: UNITED KINGDOM

~ jan

------------
Zone 7a, SE Washington StatePonds:www.jjspond.us

Thanks for spending time on this. It is only a small garden feature
pond.