currently feed our comets '' omega one medium goldfish pellets'' and occasionally some ''spirulina 20'' . we have 7 comets about 6'' long and 4 babies from last year about 3'' long . there is also one black fish same size as other 4 babies , i'm assuming it is a comet as well . feed twice a day and roughly 25 pellets [sinking] at a time . i've read to feed for about 2 or 3 minutes and recover left over food . our fish consume what i feed in 10 to 15 seconds and would consume most of the container in 3 minutes . wondered if there was a better choice of food and your thoughts on quantity i feed them . yes , i did a search and it was worthless as most searches i've done on here have been . all thoughts appreciated . . .peace.....ps . of course i change food and quantity when temperature goes down .