Tetra NitrateMinus helps control algae growth. Reduces nitrates in a natural, biological way, thanks to the activity of bacteria. Improves water quality. Suitable for any
TetraTec FB 250/300 bio-sponge for internal filters. It is used as a component part of the filter units of the internal filters EasyCrystal Filter 250 and
Ceramic ring TetraTec CR 400/600/700/1200/2400 Used for TetraTec EX 400/600/700/1200/2400 external filters. Sufficiently large inner surface of the ring by mechanical means