+1 to what Myka said
270g eh! Awesome!!!
I have had reef tank for 6 year 6X Turn over is good.
What is the purpose of the refuge? Nitrate reduction or pod production?
As you are setting thing up just make sure you have enough room to vacuum out the skimmer and return section . Diatoms collect there and it's pain to clean if you don't have enough space.
Post some pics
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