Auto Dosing Solutions?
Anybody have a decent solution to autodosing fertilizers? I'm perpetually terrible at keeping to dosing schedules so I want to put my tank on an autodosing for NPK macros and micros. I was thinking maybe keeping an eye out for cheap syringe pumps and putting those on a timer, or maybe make an air pressure based pumping system. But if there's a way to buy one for <$50 with two pumping heads that would be great. I know they sell individual pumping heads but it doesn't seem economical to build a system from scratch since I'd have to buy the parts to make it programmable and do the electrical work for it as well.