Latest controller and dosing systems?

[oursswim]

I have an older vertex cerebra system and it's time for replacement. What are the current recommendations for a control and dosing system on a Red Sea Reefer 54 gallon aquarium?

 

[kvansloo]

There is a wide selection out there now. I use GHL on my tanks and have enjoyed them some other have not had such good luck. Red Sea has a decent system also from what I read. Do some research and Good luck.