I had a 8" jardini and it took him about 5 days for me to see him eat the floating food sticks, I left the sticks in because the catfish in tank would eat them once they sink or got caught on filter. I noticed mine was fat so I did not worry about him not eating, I just had to be very still and patient before he ate in front on me. Now I have another jardini, about 1-2" bigger than my other in the same 180 gallon tank, doing fine so far, both eating floating sticks. I also have 2 baby jardini in a 55 to grow up and out of soon.