problem with columbians

[04mach1]

hey i have a 60 gal. tank with 4 columbian sharks and a pictus cat. along with 18 zebras and a pleco.
all my sharks are between 1.5 and 2.75 inches long and i have been feeding flake food and blood worms in a can.

over the last couple days i have noticed that the sharks werent eating.
i called the local store and they said give them sicklet pellets. i tried.. they float at the top and nothing happens.

i woke up today and 1 of my sharks was dead so now i have 3.
wondering what i could feed them so they all live...
i have had them all for about 3 weeks now and the tank going for about 1.5 months.
oh i also did a water change and added some cycle chemical.

 

[toxicfish]

sicklet pellet... I think you meant cichlid pellets


Have you tried to feed them frozen foods? brine shimp, marnket shrimp, smelt, etc.

Also do you have any testing equipment to make sure your tank has fully cycled?

 

[DeLgAdO]

why is everyones columbians dying??

i am puzzled by this

i keep getting pms about keeping them alive and getting them to grow

its no secret people, i take care of them just like the rest of my fish.



these guys eat hikari gold pellets and this