I bought an a c remora pro skimmer and it came with a mag 3 pump which is to big in my 20 gallon tank? I dont want to buy a rio ive heard a lot of bad things about them, so what im asking is whats a good replacment power head for my skimmer. thanks

Jackson didn't take into consideration the space it would take up in your tank. Other people on that thread pointed you to the Remora or Remora nano & even gave their experience.
You should look into picking up a Remora that uses the MJ1200. You could even get away with the Remora Nano for a 20g tank.
Actually I didn't know he was going to put a mag 3 (remora pro) on a 20 gal. This is the reason I never recommend the remora pro. Who the heck wants a mag 3 hanging in their tank? I only said don't worry about overskimming your tank.
