These little wafers sink to the bottom of the tank and are convenient for feeding bottom dwellers like catfish. The package says they are even good for hermit crabs. They dissolve slowly so the bottom dwellers can feed--that is if the regular fish stay away. My guppies even love these things and will feed with the catfish.

Pros: everyone likes it

Cons: none

The product was good but almost a little too good. What the fish didnt eat sat on the bottom of the tank requiring me to clean it more often. I tried cutting back on the amount and it didnt matter.

Pros: Seemed to last longer

Cons: Last a little too too long

The algae eater really loves this.

Pros: easy to use

Cons: none