First of all, welcome to MAAST. Nobody here will make fun of you.

I think that a 10 gallon tank as a sump is going to be too small for a 55, even with two of them. You might be a little better served going with a single 20 or possible even a little larger and then using one of the 10's as a separate refugium. The reason is that it can be difficult (not impossible) to combine and plumb two 10's. If you have to use the two 10's, this is how I would do it:

1) Drain the 55 into the first 10 gallon tank. This tank should sit higher than your second 10 gallon tank. This one should be the primary refugium.

2) Gravity drain the first 10 into the second 10 gallon tank and then have a pump that returns the water to the 55.

Only problem with the design is that if you get a power failure, the two 10 gallon tanks might not be able to handle the overflow and you could have a flood. You would have to set the drain on the 55 pretty high so if the power fails, not much water would drain out. This also means you will have to have a system in place to keep your water topped off.

Hope that helps. If you have more questions, ask away, you will get answers.