Download Chemical Treatments - Bellingham Technical College

Chemical Treatments
parts per million (ppm)
Instructions:
Treat ponds 3 & 4 which have 500,000 Chum
in each for bacterial gill disease
with 1.5 ppm Potassium Permanganate
for 60 minutes plus exchange.
Calculate
Exchange Rate:
4,228 + 3,400 = 7,628 cu. ft.
7,628 X 7.48 = 57,057 gal. to treat
57,057 gal / 1,122 gpm flow = 50.85 min exchange
Needed 1 gallon units to drip:
60 min treatment + 51 min exchange = 111 min treatment
111 total min / 10 min 1 gallon units = 11.1 or 12 gal units
Total treatment is 12 – 1 gal units which will be dripped 120 min
Chemical Calculation:
1,122 gpm water flow X 10 min = 11,220 gallons in 10 min
11,220 gpm X 3,785 ml/gal = 42,467,700 = 42.46 ml (for 1 ppm)
1,000,000
1,000,000
42.46 ml or grams X 1.5 ppm (wanted strength) = 63.69 g
Or 64 grams / 1 gallon unit dripped every 10 min for 120 min.
Advantages of Drip Treatments:
1) There are not hot spots of chemical in the pond
2) The chemical slowly increases in strength
3) The chemical slowly decreases in strength
4) There is a longer exposure to the chemical
5) Less immediate stress and less mortality
6) Exposure to workers and general public is reduced
Note:
If a salt lick block or bag of salt is added to the pond during
the treatment, it will reduce stress to the fish as well as
dehydrate the parasite or bacteria, making the treatment
more effective.
PowerPoint Presentation done by:
Old Chum Productions
Earl Steele
Bellingham Technical College
Whatcom Creek Hatchery
Bellingham, Washington 98225
360-752-8352