Tropical Fish Keeping - Aquarium fish care and resources

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Tbone 02-27-2008 12:12 PM

Stocking 55 gal
how do you know haw many fish to put in a tank is there like a ratio or something to go by?

tran2255 02-27-2008 12:58 PM

1 inch rule
usually the rule of thumb is only put 1 inch of fish per gallon, smaller if its a saltwater tank. That means if your tank is a 10 gallon, you should only put 10 neon tetras in, as they only get about 1 inch each. Make sure you use their maximum length instead of the length they are now for your calculation. also, adding more than that my put your tank at risk of overcrowding

Tbone 02-27-2008 06:50 PM

ok thanks

Cody 02-27-2008 07:49 PM

If it is saltwater, DO NOT go by that rule. Don't even go by that rule for FW. Can you put a 12" Oscar in a 12gallon tank? I thought not. Some fish have huge bioloads and small bodies, while others are the exact oppostites.

dallops_of_polyps 02-27-2008 07:56 PM

that is the most unscientific theory i have ever heard. i would say any where from 4-6 medium(anthias) fish 3 large(angels) or like 10 small(damsels/chromis).

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