On Mon, 07 Jan 2008 19:27:26 +0000, chris098 via PetKB.com wrote:

i have a gravel cleaner,which i do use from time to time when needed,all the
fish in my tank apart from the corys,are tetras,barbs,danios,glass fish,whats
the best way to get the amount of food right that you feed,so keeping the
bottom cleaner

You'll get various answers to that. If you feed twice a day as most do,
put a little food in - if it's gone in less than a minute you haven't
given them enough. If there's still some left after two minutes, you're
feeding too much.

For the cories, at most a half a bottom feeder tablet per fish once a day
should be more than enough. Don't feed them at all one or two days a week
and they'll do a better job of cleanup. But if you get the food amount
right for the other fish the cories will need fed at least 6 days a week.