Arduino Syringe Aquarium Aquaphonics Lyquid Dispenser

Hi Again. I made this because i need to use some miracle fertilizer(liquid) from 2 bottles to grow my plants. This must be put in the aquarium at 6:00Am, and only a preset amount of ml (in my case only 4ml for 180L aquarium). http://www.youtube.com/watch?v=HHdTIGn8umk Also on the market the liquid dispensers for aquariums are very expensive, and the cheap ones are not reliable. I just made this version 1 of the Syringe dispencer, that I will make two pieces controlled by arduino.