This is true but I usually do not see too much left, and I think they come back and eat it shortly anyway.

Then again I may not be feeding them enough as it is so I could put more in of the floating food and remove what is left after 15 min or so.

I would like to have a feeder hooked up that would just add a little food every hour or so but due to location of tank I think someone would take the feeder.

I was actually going to use a deer feeder and put it just above the water so the food would not get thrown our of the tank, but since this would be in my front yard it would be easy to swipe the tank when I am gone or at night. If we ever move out I will give this a shot though.

I am in the process of adding another type of filter to help clear up the water just have to get some ideas and find some more time to work on it.