my tank just cleaned

i had a problem earlier, well actually for the past couple days... my big orange fish "tickles jr" was just sitting on the bottom of the tank, not moving. i didn't know what was wrong since my levels were normal. nitrates at 6.6 and ammonia at near 0. it's really hard to get a goldfish tank at 0 ammonia all the time, as they are SO messy!! i thought about tanking half the gravel out to help the problem, their "pooping" problem, but that won't help much i don't think. i tried to read online as to why my goldie was sitting on the bottom of the tank, but i could never find a solution that helped. the water was a wee bit warmer than normal, but that shouldn't cause him to just sit there for a long time. he would come to the surface when i would come over to the tank, so i knew that was a good sign. i decided to feed him some peas (thinking maybe he was constipated) and that perked him up a bit, as you can see by this photo here...

i even went to petsmart to get some vacation food (i will be going out of town this sunday for a week) so i decided to ask the girl that worked there if she knew what was wrong with my fish. of course she had no clue. "i'm sorry ma'am, i really don't know" how could you not help me and you work in a pet store?!? why do those stores always hire people that don't have any idea about fish? geez.

but anyway, he seems to be doing ok now...