I did not see that thread in the search done. Thanks. The pic above is a $100 cheepie. I'm curious if anyone has has any luck with them or has tried to get parts and seals, it seems that the springs break sometimes. Of course if you pay 5x the price for a Dositron you will get support and parts.
The Chemilizer mentioned in the other thread looks interesting. Also theAquaBlend Injector Medicator and Gator-XL™ Chemical Feed Pump. Any experience with these?