Adrian Tappin wrote:
>
> At 07:27 13/06/99 +1000, you wrote:
> >>----- Original Message -----
> >>From: Deanne Gaskill <d.gaskill at qut.edu.au>
> >>To: <rainbowfish at pcug.org.au>
> >>Sent: Saturday, 12 June 1999 13:39
> >>Subject: [RML] my rainbows & myco
> >>
> >>
> >>> > . I have bought some
> >>> pool chlorine to sterilise the hospital tank & all cleaning equipment
> >>> (although it could be too late for the other community tanks). If the
> >>> sterilising dose is 200ppm or 200mgm per litre could somebody advise how
> >>> much chlorine (labelled as 650g/kg) I should use per litre. Thanx in
> >>> advance. Deanne
> >>>
> >
> >To calculate the dose rate of a chemical required in a given volume of water
> >the formula is:
> >Dose rate = required ppm x volume of water to be treated ÷ (% of active
> >ingredient x 1,000,000)
> >
> >Example:
> >To calculate the dose rate of 200 ppm of a chemical with an active
> >ingredient of 650 grams/Kg in 100 litres of water = 200 ppm x 100 litres ÷
> >(65% x 1,000,000)
> >
> >Active ingredient of chemical is 650 grams/litre = 0.650 grams/milliliter
> >You need 200 parts per million (ppm) which translates to 200 milligrams per
> >litre (mg/L)
> >(1000 grams = 1 litre, 1000 milligrams = 1 gram, 1 million milligrams = 1
> >litre or 1 mg/L = 1 ppm)
> >100 litres at 200 mg/litre = 20000 mg or 200 grams
> >200 grams needed divided by 0.650 grams/mil of chemical = 300 milligrams per
> >100 litres of water
> >
> >I HOPE that's right - anyone else done the calculations????
>
> Oops - I think that should be (3000 mg) = 30 grams per 100 litres water ?
>
> Adrian.
>
> Adrian R. Tappin
> Brisbane, Australia.
> "Home of the Rainbowfish"
> http://www.ecn.net.au/~atappin/home.htm