ATM Colony Marine


Size: 946ml
Sale price£25.99
In stock (5 units), ready to be shipped


Want to Instantly Cycle your Aquarium?

“True” Nitrifying Bacteria: The Real Thing

When to Use? 

  • To rapidly establish bio-filtration in New aquariums
  • After medicating
  • When adding new livestock
  • Replacing media

How it works?

Only aerobic autotrophs perform bio-filtration in the context of the nitrogen cycle, so not just any bacteria will do.  As these bacteria have a comparatively slow growth rate, a wait of 6-8 weeks may be required to establish bio-filtration in a new aquarium as their numbers at this stage are very low.

Colony effectively speeds up this process by introducing millions of these bacteria all at once.  What’s more, is that the education that comes with every bottle of Colony is invaluable to understanding bio-filtration as the first livestock that goes into your aquarium.

Bottle Size/Treatable Tank Volume

946ml - Cycles 378 Litres

473ml - Cycles 189 Litres

236ml - Cycles 95 Litres

118ml - Cycles 45 Litres


Maintain average water temperatures of 23-30°C (74-86°F). For best results, maintain a pH between 7.2–8.0. Always maintain a minimum 90 ppm Total Alkalinity. Systems requiring a pH level below 7.2 should be slowly adjusted after ageing/cycling the system at 7.2–8.0 pH. Shake bottle vigorously to mix bacteria. For average water conditions add 118 ml (4 oz) of ATM ColonyTM Freshwater per 95 L (25 gal) of dechlorinated aquarium water (tap water recommended). Dose entire system volume once. Do not overcrowd tank. Prevent ammonia and nitrite spikes by feeding fish lightly when applying Colony. Monitor ammonia and nitrite levels and slightly increase feeding rate after 4 consecutive days of at, or near, 0 ppm ammonia and nitrite concentrations. Gradually increase to normal feeding levels.

NOTE: Turn off or unplug UV sterilisers, protein skimmers, and ozone generators prior to and 4-5 days after each introduction of ATM ColonyTM Freshwater. Keep at room temperature and do not allow product to freeze or exceed 43°C (110°F). No water changes until after the fourth day when all bacteria has attached.

No refrigeration required. Keep out of reach of children.

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