RO/DI it's easy and cheaper than buying. with the cost of the things in the tank I would not take the chance. My tap reads 180-240.ro/di 0. this is the only way to go.
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75 gal,coralife 95W X4 50/50, 4" Aragonite crushed coral, Red Sea Skimmer, Wave-maker 5 Maxi Jet 1200's ,coil denitrator, And about 50 lbs of live rock.
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