dosing pump help please

Hey guys I'm back. Been a long time.away!!!! I need some help with dosing pumps. I got a new 125g tank with 40g breeder sump. I need to dose 2 part and it's becoming to hard for me to do everyday and I'm about to launch Into sps and need more consistent dosing. What pumps should I use and why???? I'm trying to figure out what the difference between the pumps r and why one is better than the other. Also what 2 part do u dose with i currently use seachem and that's all I've used. Any other recommendations? ? Thanks guys