Rinse before use. Use in a fine mesh (180 micron or less) filter bag such as Seachem’s The Bag.
For best results, Purigen should be placed so as to maximize the flow of water through it.
It may be used in a canister filter, media chamber, box filter, or any high flow area of a trickle filter.
Each 250 mL treats up to 1,000 L (250 US gallons) for up to six months.
Exhaustion is indicated by a pronounced discoloration of the beads to dark brown or black.
Capacity:
Purigen’s possesses enhanced capacity owing to its vast surface area.
All other resins on the market are purely spherical extruded beads.
These beads remain smooth even under a microscope. Purigen® is both spherical and macroreticular.
It has microscopic pores that increase its usable surface area to many times that of a purely spherical resin.
Regeneration:
Soak in a 1:1 bleach:water solution for 24 hours in a non-metallic container in a well ventilated area and away from children.
Use regular 8.25% hypochlorite household bleach (non-scented, no dyes, do not use a splash-less bleach).
Rinse well, then soak for 8 hours with a solution containing 4 tablespoons of Prime, or equivalent dechlorinator per cup of water.
Rinse well.
For freshwater use, soak for 4 hours with a solution containing 2 tablespoons of buffer per cup of water (Discus Buffer, Neutral Regulator). Original color and full activity should now be restored and Purigen® is ready for reuse.
Caution: some slime coat products may permanently foul Purigen and render regeneration difficult.
Do not reuse if odor of bleach/chlorine is detectable.
In case of doubt, soak beads in small quantity of water and test for residual chlorine with a chlorine test kit.