1 minute seems to be the minimum on time for most timers I've seen. My75 evaporates about 3 gallons a week which is more than enough to make up for the .22liters/min.
A solenoid valve would work but then theres the problem of hiding the drip container as it has to be above the water mark. A decent solenoid valve had to be at least $20 last time I checked.
I'm gonna do some experimenting with the pump. I might also be able to regulate the flow with an airline valve to fine tune it a little. I'll let you guys know how this all pans out. At $9.99, I figured I'd give it a shot. My daily coffee habit cost more than that.
FILSTAR Pimp #2
75 gal heavily planted,50/50 Black beauty,Eco-complete substrate, Pressurised CO2 with solenoid, ph controller, AB Reactor 1000, 330 watts 9325K GE PC lighting,Ehiem Liquidoser, 2-Filstar xp3 canisters.