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Lab Test Report of Water Quality Parameters
Department of Aquaculture
Faculty of Fisheries
Chittagong Veterinary and Animal Sciences University
Parameter
tested
Optimum Level Data found Comment
DO
In successive 24h, above 16 h
should be higher than 5 mg/l,
and the other time should not be
lower than 3 mg/l
10 ppm Good in condition
pH
Freshwater 6.5-8.5, seawater
7.4-8.5
7.83
Good, but it is closed to
upper limit for
freshwater (it may be
related to Ammonia
content)
Salinity
For freshwater it is ideal to be 0,
but some species can tolerate
some exceeding.
0 ppt Ok
Nitrate
<5.0 ppm for shrimp culture
Levels exceeding 50 mg/L
(ppm) nitrate-nitrogen are
considered unhealthy for lakes.
0.1 ppm Good
Nitrite
<0.01 ppm for shrimp culture,
Levels exceeding 0.55 mg/L
(ppm) nitrite-nitrogen can cause
'brown-blood' disease in finfish.
<0.2ppm Good
Ammonia
NH3, which is toxic to fish (both
freshwater and marine) at >0.03
mg/L (ppm)(1)
0.393 mg/l
Lethal in condition,
Take steps as soon as
possible
Ammonium
The safe level of NH4
+
is
between 0.02 and 0.4(1) 0.320mg/l
It is in optimum
condition, but very close
to the upper limit
Turbidity 15-20 FNU
5.48 FNU
(Formazin
Nephelometric
Units)
Very Low than the
normal condition
Chlorophyll 3.5 2.34 Low
উ সমস া সমাধােন িনে া পদে প নয়া যেত পােরঃ
1. চুন েয়াগ। চুন মূলত এেমািনয়া গ াস ক রীভূত করেব না। এটা িপ এইচ িঠক
করেত সাহায করেব। িক এিট কাযকর। সাধারণত শতক িত ৫০০ থেক ১০০০
াম চুন েয়াগ করা হেয় থােক। পাথুের চুন হেল এক কিজ, আর পাড়া চুন হেল
৫০০ াম িত শতেক িদেবন।
2. স ব হেল পািনর গিভরতা কিমেয় ৫ থেক ৬ িফেটর মেধ িনেয় আসা। যােত সবুজ
কণা উৎপাদন িনি ত হয়।
3. এেমািনয়া হল মূলত নাইে ােজন সােরর সমতুল । িক পািনেত সবুজ কণা
উতপাদেনর জন নাইে ােজেনর পাশাপািশ ফসফরাস সার ও েয়াজন। তাই
ফসফরাস সার অ েয়াগ কের দখেত হেব অব ার উ িত হে িকনা। সবুজ
কণা উৎপািদত হেল তারা তােদর খাদ িহেসেব অই এেমািনয়া ক পািন হেত কিমেয়
িদেব, অপরিদেক সবুজ কণা কাপ জাতীয় মােছর জন খাদ িহেসেব ব ব ত হয়।
িটএসিপ সার িত শতেক ২০ াম কের দয়া যেত পাের(পরী ামুলক)
4. পািনেত বাঁশ পটােনা যেত পাের। এেত কের পািনর িতকর এেমািনয়া কম
িতকর এেমািনয়ােম পিরণত হেব। যিদও এিট তমন কােনা কাযকর পদে প
নয়।
5. ছাই েয়াগ করা যেত পাের। সাধারণত শতেক এক কিজ কের েয়াগ করা হয়।
6. িত শতেক ৫ থেক ছয়টা মা র মাছ ছাড়া যেত পাের। গ াস সমস ায় এই মাছ
অেনক িটেক থােক ও পািনর ওেলাট পােলাট কের গ াস দূর কের।
7. এেমািনয়া জিনত িবষা তায় মাছ যখন মরেত থােক তখন লবন েয়াগ অব ার
উ িত ঘটায়।

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Water parameter analysis of a lake in Bangladesh

  • 1. Lab Test Report of Water Quality Parameters Department of Aquaculture Faculty of Fisheries Chittagong Veterinary and Animal Sciences University Parameter tested Optimum Level Data found Comment DO In successive 24h, above 16 h should be higher than 5 mg/l, and the other time should not be lower than 3 mg/l 10 ppm Good in condition pH Freshwater 6.5-8.5, seawater 7.4-8.5 7.83 Good, but it is closed to upper limit for freshwater (it may be related to Ammonia content) Salinity For freshwater it is ideal to be 0, but some species can tolerate some exceeding. 0 ppt Ok Nitrate <5.0 ppm for shrimp culture Levels exceeding 50 mg/L (ppm) nitrate-nitrogen are considered unhealthy for lakes. 0.1 ppm Good Nitrite <0.01 ppm for shrimp culture, Levels exceeding 0.55 mg/L (ppm) nitrite-nitrogen can cause 'brown-blood' disease in finfish. <0.2ppm Good Ammonia NH3, which is toxic to fish (both freshwater and marine) at >0.03 mg/L (ppm)(1) 0.393 mg/l Lethal in condition, Take steps as soon as possible Ammonium The safe level of NH4 + is between 0.02 and 0.4(1) 0.320mg/l It is in optimum condition, but very close to the upper limit Turbidity 15-20 FNU 5.48 FNU (Formazin Nephelometric Units) Very Low than the normal condition Chlorophyll 3.5 2.34 Low
  • 2. উ সমস া সমাধােন িনে া পদে প নয়া যেত পােরঃ 1. চুন েয়াগ। চুন মূলত এেমািনয়া গ াস ক রীভূত করেব না। এটা িপ এইচ িঠক করেত সাহায করেব। িক এিট কাযকর। সাধারণত শতক িত ৫০০ থেক ১০০০ াম চুন েয়াগ করা হেয় থােক। পাথুের চুন হেল এক কিজ, আর পাড়া চুন হেল ৫০০ াম িত শতেক িদেবন। 2. স ব হেল পািনর গিভরতা কিমেয় ৫ থেক ৬ িফেটর মেধ িনেয় আসা। যােত সবুজ কণা উৎপাদন িনি ত হয়। 3. এেমািনয়া হল মূলত নাইে ােজন সােরর সমতুল । িক পািনেত সবুজ কণা উতপাদেনর জন নাইে ােজেনর পাশাপািশ ফসফরাস সার ও েয়াজন। তাই ফসফরাস সার অ েয়াগ কের দখেত হেব অব ার উ িত হে িকনা। সবুজ কণা উৎপািদত হেল তারা তােদর খাদ িহেসেব অই এেমািনয়া ক পািন হেত কিমেয় িদেব, অপরিদেক সবুজ কণা কাপ জাতীয় মােছর জন খাদ িহেসেব ব ব ত হয়। িটএসিপ সার িত শতেক ২০ াম কের দয়া যেত পাের(পরী ামুলক) 4. পািনেত বাঁশ পটােনা যেত পাের। এেত কের পািনর িতকর এেমািনয়া কম িতকর এেমািনয়ােম পিরণত হেব। যিদও এিট তমন কােনা কাযকর পদে প নয়। 5. ছাই েয়াগ করা যেত পাের। সাধারণত শতেক এক কিজ কের েয়াগ করা হয়। 6. িত শতেক ৫ থেক ছয়টা মা র মাছ ছাড়া যেত পাের। গ াস সমস ায় এই মাছ অেনক িটেক থােক ও পািনর ওেলাট পােলাট কের গ াস দূর কের। 7. এেমািনয়া জিনত িবষা তায় মাছ যখন মরেত থােক তখন লবন েয়াগ অব ার উ িত ঘটায়।