The free shipping method of this product will be letter pack plus. Since the outer box size is large and does not fit into the envelope, it will be packed in the outer box folded.. Letter pack plus delivery is usually required for about 1 to 3 days. If you are in a hurry, please select a courier service. Letter pack plus has a tracking number and is a face -to -face delivery by sealing. Please note that there will be no damage compensation, no cash on delivery, and no time specification. Red Sea NO3: PO4-X is a unique complex that contains multiple different carbon molecules and other organic combination components.. ● Safe reduction while controlling nitrate and phosphate. ● Maintain nitrate and phosphate at the desired concentration. ● Promotes coral growth and colored color. ● Safe and harmful side effects for corals. [How to use] No3: PO4-X is easy to use, just add it to the aquarium little by little every day.. The daily added amount is calculated based on the concentration of the measured nitrate and phosphate (see the instructions).. By controlling the concentration of nitrate and phosphate in detail, it is possible to accurately maintain the target nutrient salt concentration..

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