ABE16746 Chemi-Pure Mini Elite Formula for Aquarium, 3.1-Ounce

Is this size good for 10-20 GAL tank?

what's the size for the package? want to know if it can be used to replace the cartridge in my aqueon A15 internal filter

what's the size for the package? Want to know if it can be used to replace the cartridge in aqueon A15 internal filter

Is this enough for a 45 gallon aquarium?