This makes much more sense than the "normal" way this rule is always applied, i have never met anyone that calculated it this way though.guppy;1096410; said:This is something that comes up fairly often and is rather misunderstood therefore I will attempt to clarify the original meaning of the general guideline of "one inch of fish per gallon of water".
This is a suggested guideline for a well maintained and filtered tank.
It does not apply to all fish as some have differing requirements.
Here is the part that is being misunderstood.
The "rule" does NOT refer to the length of the fish!
The "rule" applies to the cubic inches of fish in the tank.
This means that a 5" gourami should be measured in this manner,
length overall (5"),
height, (2 1/2"),
so for this fish you multiply the following, 5x 1/2x 2 1/2, this gives you a total of 6 1/4 gallons of water.
As you can see this works fairly well.
You do also have to apply some common sense and allow for such things as potential growth, the fish types' tolerance for crowding, and of course the width and length of the tank (a 24" gar will not work in an 18" wide tank even if the tank holds 100 gallons).
So please people, accept that this is just a generalized guideline to figure potential stocking levels, not a hard and fast rule.
Also remember that just because you don't like it doesn't mean you should slam somebody for using it.
And lastly, please don't flame someone by saying a 10" oscar doesn't fit in a 10" tank.
Of course it doesn't,
but the rule never said it would.
that's pretty much my feelings on the issue but so many people demand that there be a rule that works that it gets tiresome explaining that every fish is different and going to have different needs. at least this one is a lot better than the usual inch per gallon.just read up on fish growth rate and there natural environment. Fill your tank or upgrade to larger tank as fish grow. This is not a rule for any one to pass or use if you want any fish success.