Dosing setups - pictures

[Delphinus]

Mine's even more simple and would be fair to call it ghetto. I use two aqualifter pumps ($15 each), ARM or carbon containers for the reservoirs (about 1 gallon volume), and then needle valves at the output for throttling down the driprate. Adjusting the right volume is a combination of how many minutes on the timers are plus opening up or closing down the drip valves. The timers run at 6 intervals of 2 minutes each, offset by 1.5 hours so that they don't drip at the same time.