PÛRA NitrateLock rapidly removes and maintains extremely low to non-measurable levels of nitrates in fresh and salt-water aquariums. Long lasting, can be regenerated 100#@#s of times. Drastically reduces number of necessary water changes. Regeneration is accomplished with plain table salt, quick and completely safe.

Convenient to implement, comes with a 6" x 12" 300-micron media bag and is available in two sizes:

500 ml - treats 50 Gal tank for up to 24 months