Refugium vs QT tank vs. Sump

sedna

New Member
Hey everyone! New member here, and new hobbyist. I had a chance to pick up a 125 gallon tank at a steal from another hobbyist, but am waiting to buy a new house to fit it in. (Needless to say, that's a high quality problem.)
I'm spending the next several months learning everything I can, and I have a question I can't seem to figure out. Can anyone filll me in on the differences between a refugium and a QT Tank? I gather they are not the same, but does that mean that I will need a total of 3 tanks plus my sump?
Thanks for the input, I've enjoyed following everyone's threads on other questions.
 
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