Measuring Medication...mg/g/ml/tsp SO CONFUSED!

jac8724

jac8724

AC Members
Dec 1, 2006
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Chicago
So I need to medicate my fish for parasites, and the medicine I bought (Metronidazole) calls for 9.7 g/10 gallon on the lablel.

However, every single article, website, forum I've come across, says to dose the water with 250mg/10 gallon.

I cant figure out how much that is, because I don't have a miniature metric scale. Mg and g are a weight, and tsp/tbsp/ml (what I have on hand to measure with) is a size. I don't know how to convert this.

I really wish they would put this stuff in tsb, tbsp, or ml at the very least. I have NO idea what to put in my tank, and I've spent lots of time looking online. The medicine looks like the consistency of salt.

Does anyone have any idea what I should do here? Any science people, please help!
 
jac,
U R absolutely correct about the difficulties of measuring things correctly. I came from Germany over 47 years ago and had to get used to the: tsp - Tbsp. - pint - U get the idea...cursed often and loudly in German.
***
We measured:
1 tsp salt = about 7 grams
***
Try that, and I hope it helps.

My husband purchased a small digital scale on www.Amazon.com
 
Go on the internet and pull up a conversion calculator or chart. Go to conversions online.
 
I can understand your frustration with that. A conversion calculator won't help to give and accurate conversion at all due to the fact that the volume to mass ratios vary for everything(saltwater weighs more than tap water). Like stated, a scale will be the only way to know how much you are really putting in there.
 
Hello all Fish-fish-fanatic-daaaaaaalinks,
You need conversion info, write to me and I will help.

Conversion tool on internet:
converting "distance, volume, temps and so on" is great, BUT

...to achieve the correct weight conversion of a small unit such as "Gramm/gram" is often a pain in the reardom. I know, I had to learn Universal/American measurements 47 years.
*****

JAC,
I have another idea! Listen up!
Check with your local Pharmacy about locating a "dispensing syringe" for fluids. On this type of syringe you will find gradation/markings for "ml, cc" and so on.
Hope this will help.

ta, ta, und Auf Wiedersehen/writing
 
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To all - halli, hallo, I am back!
I was digging in my computer library for info regarding measuring liquids AND I found good stuff. Read on:

Calculating Water Volume In U.S. Gallons
1. Mathematical Formulas
a. If computed in inches, divide the total by 231.
b. If computed in feet, multiply the total by 7.5
Rectangular shapes: length X width X depth.
Circular shapes: 3.14 X radius² X depth
2. Using a domestic water meter: Use a wrench to turn the locking nut on the meter to remove the lid. Record the reading before filling the pond. Subtract this figure from the figure recorded after filling is completed. No water at all should be used in the house during filling.
3. Using hose output: Fill a large bucket for exactly 60 seconds. Measure the water in pints and divide by 8 to compute U.S. gallons. Record start and stop times of filling the pond. Multiply the total minutes required for filling by the number of gallons the hose discharges in one minute.
Calculating Water Volume In Liters
1. Multiply length X width X depth in meters X 28.41 for rectangular volume.
2. Multiply depth in meters X metric diameter² X 20.75 for circular volume.


Frequently Used Equivalents​

ppm (parts per million) is equivalent to one milligram per liter of water.
5ml = 1 teaspoon
20 drops = 1 ml.
60 drops = 1 teaspoon
15ml = 1 tablespoon
2 tsp. = 1 dessert spoon
2 dessert spoons = 1 tablespoon
2 tbsp. = 1 fl. oz.
8 fl. oz. = 1 cup
1 cup = 48 teaspoons
1 cup = 16 tablespoons
1 cup = 237ml.
*These figures are commonly supplied by most chart sources. However, using a standard, pharmacist-supplied, two-milliliter eye dropper and a standard kitchen measuring teaspoon, the equivalency was found to be 3ml/tsp. and 9ml/tbsp.
*Culinary, or food industry measuring devices and weights are different from pharmaceutical and laboratory measuring devices.
***

Table of Liquid Equivalents

1 milliliter (ml) = 1 cm³

= 1cc

= 20 drops

= 0.20 tsp.

= 0.061 in.³

= 0.001 L

= 1gm. of water

= 0.002 lb. of water

= 0.0003 U.S. gallons


1 U.S. Gallon (gal.) = 3.785 L

= 0.1339 ft.³

= 231 in.³

= 8.345 lb. of water

= 3785.4 gm. of water

= 4qt.

= 8 pt.

= 135.52 oz.

= 128 fluid oz.

= 3785.4 ml

1 fluid ounce = 6 tsp.

= 2 tbsp.

= 0.0078 U.S. gal.

= 0.031 qt.

= 29.57 gm.

= 0.062 pt.

= 0.065 lb.

= 1.04 oz.

1 Imperial gallon = 4.5459L

= 0.1605 ft.³

= 277.42 in. ³

4.845 qt.

I HOPE ALL THAT INFO HELPS. I am going to create a picture from this info and store it in my Personal Gallery 4 all to read.
 
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I'm not doubting any of those formulas, all are proven. Yet, although 1tsp will always equal 5ml, the question at hand is how much a 1tsp/5ml wieghs. 1tsp of lead does not weigh the same as 1tsp of aluminum,water,sand,sugar flour or anything else that does not carry the same density. The OP wants to know how much a given volume weighs. tThe only way to know that is to weigh said volume for mass. Once that is known then all conversions can be figured given above formulas. A mm is equal to .03937" but knowing that formula for length does not aid in knowing mass or volume.
 
Does this medicine come in tablets, crystals, powder or liquid? The "weight" of the medicine per volume of water is going to be dependent on the other ingredients. I thought that the "250 mg/10gal" dose was specifically for the medicine in the form of tablets and each tablet was 250 mg. That makes the math pretty easy even without a scale.

Also, a scale that reads in mg is pretty small or extremely accurate. According to answers.com (http://wiki.answers.com/Q/What_household_item_weighs_one_gram) one gram = the weight of one US Bill (any demonination).

Not much help. sorry
 
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