So i am having a moment here. How do you calculate parts per thousand? I want to calculate how much salt (6g per tablespoon) for prolonged salt baths, quarantine etc. Its sad I could do this easily a year ago!
PPT calculations
- Thread starter Charney
- Start date
What concentration/volume of water do you want? You don't really need to calculate parts per thousand for salt baths. if you wanted to you would have to use the atomic mass of water instead of the volume.
You can calculate concentration using whatever units you want, it has nothing to do with parts per thousand. Parts per thousand means nothing without units. Parts per thousand is merely a ratio whereas concentration is a proportion.
It is wayyyy too much work but if you're up for a challenge, the average concentration of NaCl(the primary ionic salt in seawater and the salt we use for our fish tanks) is 35 ppt or 35 g per 1000 grams. Obviously we don't use grams of water in fish tanks, most of us use gallons or liters. Keeping it simple, water weighs 1 kilogram per liter so a gallon (about 3.78 liters) would weigh 3780 grams. Most people use salt in their freshwater aquariums at a rate of about 1 tablespoon (~6 grams) for every 5 gallons of water. This works out to about 1.2 grams of salt per gallon of water. A gallon of water weighs 3780 grams so the proportional parts per thousand ratio would be 0.317grams of salt per 1000 grams of water or 0.317 ppt.
In the end I would just stick with grams of salt and gallons of water as that is how most dosage rates are conveyed anyways.
It is wayyyy too much work but if you're up for a challenge, the average concentration of NaCl(the primary ionic salt in seawater and the salt we use for our fish tanks) is 35 ppt or 35 g per 1000 grams. Obviously we don't use grams of water in fish tanks, most of us use gallons or liters. Keeping it simple, water weighs 1 kilogram per liter so a gallon (about 3.78 liters) would weigh 3780 grams. Most people use salt in their freshwater aquariums at a rate of about 1 tablespoon (~6 grams) for every 5 gallons of water. This works out to about 1.2 grams of salt per gallon of water. A gallon of water weighs 3780 grams so the proportional parts per thousand ratio would be 0.317grams of salt per 1000 grams of water or 0.317 ppt.
In the end I would just stick with grams of salt and gallons of water as that is how most dosage rates are conveyed anyways.