Clear Water. Happy Fish.
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A simple 2‑step way to refresh your tank and support healthy fish.
This Aquarium Care Kit brings together a fast-acting water clarifier and gentle Methylene Blue to help your tank look clean and keep your fish feeling good. It’s an easy boost for any freshwater or saltwater setup, especially when adding new fish.
A quick fix that keeps your tank calm and clear.
✔ Helps clear cloudy water fast
✔ Supports fish during stress or new introductions
✔ Easy to dose in any aquarium or fish tank
Each bottle includes 100 ml. Safe for freshwater and saltwater tanks. Just follow simple dosing on each bottle.
We are proud to offer duty-free, reliable, tracked shipping— delivered to your door in over 200 countries worldwide!
Below you can check our average shipping times:
Domestic USA Shipping: 2-9 business days
US & Canada: 7-18 days
Europe: 7-18 days
Europe Plus*: 8-30 days
Australia, New Zealand: 7-18 days
Hong Kong, Singapore: 7-18 days
Rest of the world: 8-30 days
*does not include processing times up to 2 business days or longer in peak periods
Primarily we ship out from fulfillment centers in the United States, Eastern Asia and Western Europe. If the item you've purchased is out of inventory in your nearest location, we'll send it directly from our production lines at the same delivery times as stated in our shipping section.
Is this safe for all aquarium fish?
Yes, it works for most common freshwater and saltwater fish when used as directed.
The clarifier helps gather tiny bits floating in your tank so your water looks fresh again.
Helps keep your aquarium healthier for fish, plants, and bio‑systems.
Methylene Blue offers gentle care during new introductions or quarantine.
Two products that work side by side to keep your tank running smoothly.
Useful for aquariums, fish tanks, and aquaponic-style systems.
Made for hobbyists who want clearer water with less fuss.
| Features | MK Aquarium | Knock-Offs |
|---|---|---|
| Safe for fresh and saltwater tanks | ||
| Includes both clarifier and Methylene Blue | ||
| Fast-acting clarity boost | ||
| Helpful during fish quarantine | ||
| Easy dosing steps | ||
| Great for new fish introductions | ||
| Designed for regular maintenance | ||
| Supports cleaner, healthier tank water |
Use it when your water looks cloudy or after tank maintenance.
Yes, Methylene Blue offers gentle support when fish are adjusting.
Yes, it’s generally suitable for tanks with plants.
Methylene Blue may tint the water lightly at first, but it fades with time.
Yes, both products are simple to dose and great for new aquarium keepers.
Yes, it’s a helpful option for managing stress in quarantine setups.
The clarifier helps gather tiny floating bits so your filter can remove them.
When used as directed, it’s generally friendly to established tank systems.
You get two 100 ml bottles—one clarifier and one Methylene Blue.
