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Old 12-08-2006, 09:20 PM   #1
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Calculating how many fish to stock in a tank

i came across this "formula" for how to calculate the right number of fish for your tank. it took me a few minutes to work it out because it's in metric... but basically it said i should have 9 fish.

therefore according to the formula i'm already overstocked. i have:

2 cory's
3 oto's
6 cardinals
2 rams

i don't think i'm overstocked at all but i'm curious what others think about this "formula"...

Quote:
Length of tank * Width = Water surface area / 40 cm (standard) Now, divide the size, or the average, of the fish you want to add.

Example:
90(cm)* 35 (cm) = 3150(cm2) / 40 = 79 / 5(cm) = 15 fish.
http://www.tropicalfishcentre.co.uk/Choosing.htm
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Old 12-08-2006, 09:40 PM   #2
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how many gallons is your tank first of all?
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Old 12-08-2006, 09:49 PM   #3
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40cm = 15.75 inches. so by the formula I could have 17 fish in my tank with average size of 5 inches.
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Old 12-08-2006, 10:11 PM   #4
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oh sorry, my tank is 20G...
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20 gallon low tech planted
2 rams, 2 corys, 2 otos, 8 cardinals, 6 red phantoms, 6 lemon tetras.
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Old 12-08-2006, 10:17 PM   #5
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You really aren't that overstocked. With plants and water changes various formulas and rules can be bent =o)
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Old 12-08-2006, 10:19 PM   #6
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Your stock is fine. You may want to add a couple of more cories to fill out the school.
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