1 Inch Aquarium Fish. Less than 60 years after the first person said aquarium in connection with fish Philip Henry Gosse the 1 inch rule was layed out in a book Goldfish Breeds and Other Aquarium Fishes Their Care and Propagation By Herman Theodore Wolf 1908. What size tank do you have and what are your stocking plans.
6 cm 24 in Hardiest easiest-care species of aquarium pencilfish. They are a great choice for small community aquariums due to their peaceful temperament. It can be a good way to think about your fish-to-water volume ratio but of course there are exceptions to every rule.
All the fish are just over 1inch in length.
6 cm 24 in Hardiest easiest-care species of aquarium pencilfish. This popular aquarium species is often one of the first fish a beginner aquarist will buy. The one inch of fish per gallon rule is a handy rule-of-thumb NOT a golden standard. While they are all inch long fish the tank is only at 81 stocking level which is the ideal to shoot for this is 9 inches.
