More equalization confusion

Using a hydrometer, I tested my InterState Deep Cycle batteries. They measured 1.210. Meaning that they need to be charged. The question is how? I have a Magnum Energy Remote that will charge/equalize the batteries. Everything I have read says you need to be hooked up to 50 amp service or using your generator. I have read, several places that you run the charger for 4 hours, check your readings and then possibly run the charger for another 4 hours. I just called Inter State to make sure my batteries were the type that could be charged. They said they were, but on talking to them they advised that 50 amp was too much, that I should use a 30 amp plug and and run the charge 6-8 hours. Now I'm totally confused.