DI resin, mixed bed nuclear grade DI resin 1.5 lb bag for replacing resin in filter cartridges Mixed bed DI resin. This is the higher quality nuclear grade which is the resin of choice for reef aquarium use or laboratory use. This 1.5 pound bag of resin is enough to change out replacement media in your full size DI filter about 2 times depending on filter size. Free shipping only for orders shipped within the contiguous USA. Outside provinces, HI, and AK are all additional and an additional invoice will be sent for balance due on shipping. International orders will ship by Ebay global shipping program unless prior arrangements are made.
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