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https://www.swelluk.com:443/fluval-clearmax-phosphate-remover/ 
Fluval Clearmax - Phosphate Remover
Take control of your aquarium's phosphate levels before they feed a bloom of algae with Fluval Clearmax - Phosphate Remover.
Product Information
Fluval ClearMax is a science grade resin designed to adsorb phosphate, nitrite and nitrate.
Reducing the levels of these nutrients not only leaves a clean, healthy tank, it also lowers the possibility of algae problems.
Clearmax 300g comes with 3 x 100g bags that can be popped in to the filter easily. As the water passes through, the resin will cleanse it of any unwanted nutrients and odours - leaving a healthy, fresh tank and happy, healthy fish and plants.
Clearmax treats 300L (80 US gal) and is suitable for both fresh and saltwater aquariums.
It is compatible with all 04/05/06 and FX5/6 Fluval external filter models.
Latest Customer Reviews
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Rating Date 12/11/2018 07:11am Fluval Clearmax 300g
Seems to be working clearing the brown algae -
Rating Date 09/07/2018 09:07am Fluval Clearmax 300g
This is very good filter product I have been using it for years -
Rating Date 21/05/2018 08:05am Fluval Clearmax 300g
this is the best filter media -
Rating Date 21/01/2018 08:01am Fluval Clearmax 300g
Excellent product and very well priced at Swell UK -
Rating Date 29/12/2017 07:12am Fluval Clearmax 300g
Trying to remove nitrates from naturally high tap water. Haven't seen any significant results yet but it is early days. -
Rating Date 18/12/2017 09:12am Fluval Clearmax 300g
Not sure how well this works yet. Been running it in Fluval 206 canister filter for several days and the water is no clearer and definitely no drop in nitrate level. Maybe need to give it more time... -
Rating Date 30/01/2017 11:01am Fluval Clearmax 300g
the best product for what I want -
Rating Date 18/12/2016 08:12am Fluval Clearmax 300g
Great Product at a very competitive price. -
Rating Date 03/12/2016 11:12am Fluval Clearmax 300g
Excellent -
Rating Date 23/10/2016 20:10pm Fluval Clearmax 300g
use this product for my marine tank and it is best i've tried