[dennis]

My issue is that all the timers I have laying around work on 30 minute intervals. The only way for this to be really cheap is to be able to use cheap timers. If I have to go out and buy minute interval timers your talking about $30 each either after shipping or after tax. So,two timers is the price of one peristaltic pump and it can be sized to work for a 1/2 hour period.

I found that having the lid on added some pressure and actually made things work better, though not perfect. I am going to play around with some of these ideas a bit more. We will be off on our wedding/honeymoon in two weeks, for two weeks, and I really need to have something figured out before hand. I don't really have the liberty to spend the money on two peristaltic pumps or two really good timers but the last time I had someone feed the fish and dose the tank, it did not go so well.

I've tried your syringe/timer doser but my timers are only strong enough for a 10cc syringe (which means about 6ml can be dosed) Not enough for me, especially for micros. Larger diameter syringes are to stiff for the timers I have. If, though, I could find a nice heavy duty timer capable of moving a larger syringe, I could add larger wheel and build it to run two syringes at the same time, solving all of my problems.

I certainly need to think on this more....

Thanks for your reply. Your posts have been very helpful and insightful for me.