Description
Blue Shark Colony Freshwater Rapid Cycle
Speed up aquarium cycling the natural way with Blue Shark Colony Freshwater Rapid Cycle, a high-strength live nitrifying bacteria solution designed to quickly establish a stable biological filter in freshwater aquariums. Ideal for new setups, fish-in cycling, or boosting existing filter performance, this product helps create a safe, balanced environment for fish in a fraction of the usual cycling time.
Formulated with concentrated strains of Nitrosomonas and Nitrobacter bacteria, it works by converting toxic ammonia → nitrite → nitrate, rapidly building a functional nitrogen cycle and reducing the risk of dangerous water spikes during setup.
Features & Benefits:
- Rapid cycle technology – establishes biological filtration in days rather than weeks
- Live nitrifying bacteria – immediately begins processing ammonia and nitrite
- Supports fish safety – reduces toxic spikes during tank setup or stocking
- Freshwater specific formula – optimised for tropical and coldwater aquariums
- Boosts existing filters – strengthens biological stability in mature systems
- Trusted cycling support – widely used for fast, reliable aquarium starts
How it works:
Blue Shark Colony introduces a high concentration of beneficial bacteria that colonise filter media, substrate, and hard surfaces. These bacteria immediately begin breaking down waste compounds, rapidly establishing a stable biological filtration system capable of handling aquarium bioload.
Care & Usage Tips:
- Shake well before use
- Dose directly into aquarium water or filter inlet
- Turn off UV steriliser during initial application
- Avoid heavy feeding during cycling phase
- Monitor ammonia and nitrite levels regularly
Specifications:
- Type: Live nitrifying bacteria (freshwater)
- Function: Rapid aquarium cycling / bio-filter booster
- Suitable for: Freshwater aquariums (new or established)
- Action: Ammonia and nitrite reduction via biological conversion
Blue Shark Colony Freshwater Rapid Cycle is the fast, reliable way to establish a healthy aquarium ecosystem—helping you move from setup to stocking with confidence and stability.
Click & Collect
Livestock will only be bagged once you arrive, or if you contact us in advance to request it ready beforehand.
Local Delivery
Order anything from our in-store range and have it delivered right to you.
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Minimum spend: £50
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Delivery from £15 - £30
- Range 0-25 miles from store
Distances are measured “as the crow flies”, not by road.
Once your order is placed, we’ll be in touch to arrange a suitable delivery date and time.
Please note, delivery may take a little longer as we often group orders together to build an efficient delivery run.
Important: If you’re ordering a large aquarium, please ensure someone is available to help unload the van on arrival.
Dry Goods Delivery
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DX Express: 1 working day, same-day dispatch before noon 0-75kg
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Express Pallet: 1–3 working days 75-500kg
If you'd like to add more items to an existing order that hasn't yet been dispatched, please place a Click & Collect order and leave a note asking us to combine the orders.
Please note: We currently only dispatch parcels Wednesday to Friday.
Pre-Order
Want the full details? Check out our Terms & Conditions.
Livestock Delivery
Thursday Delivery – £24
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Dispatched Wednesday afternoon
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Delivered Thursday before 1pm
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Order by Wednesday 12 noon
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Minimum spend: £50
Friday Delivery – £24
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Dispatched Thursday afternoon
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Delivered Friday before 1pm
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Order by Thursday 12 noon
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Minimum spend: £50
Saturday Delivery – £29
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Dispatched Friday afternoon
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Delivered Saturday before 1pm
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Order by Friday 12 noon
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Minimum spend: £50
📦 Want to Add to an Existing Order?
No problem! Just place a Click & Collect order and leave a note asking us to link it with your original one (as long as it hasn’t been dispatched yet).
🛒 Dry Goods Now Included!
You can now include dry goods in your livestock delivery – perfect for topping up supplies in one go.
❄️ Please note: We can’t send frozen food with livestock – please order frozen items separately.
⚠️ Delivery Exclusions
Unfortunately, we’re unable to deliver livestock to the following postcodes:
Scotland & Isles:
AB30–AB56, DD8–DD10, DG3–DG9, DG12–DG14, FK17–FK21, KA18–KA19, KA26–KA30, PA20–PA38, PA80, PH3–PH40
Cornwall Isles: TR21–TR25
All of the following postcodes are excluded:
BT, HS, IM, IV, JE, KW
Plus Channel Islands and Shetland Islands
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.