Can it be put in the Fluval C3 Filter?

Yes, you can put it in the c-3 filter, but what I do is pretreat my water in a separate tank with Clearmax to remove the phosphates from our well water. For this I use a 5 gallon tank and a topfin filter, just put the bag of Clearmax where the charcoal filter goes. I use a little salt, and stress coat in the actual tank. I have never had a bad reaction, and my (adult) kids laugh about my tank full of invisible (not rare, just hard to find) fish. I am not aware of any phosphate remover that does not have an iron oxide component.If you issue is not your water source you might look to the food. I found that certain foods spiked the phosphorus levels, oddly enough, in my tank API foods that promised not to cause algae were the biggest problem.

Fluval, the back of the box states it treats 300L. Is this for each 100g pack or does it mean a total of 3 packs?

I am pretty sure it's for each 100g pack. There is no way that any filter for that size tank could hold 3, especially since the bag needs to be weighted down or it will float.

Is one pack of fluval clearmax enough for a 55 gallon tank?

kinda goes by how hi the test are and number of packets use. older tank 55 gallon i would probably use the 3 packs and test 1st day and 35th day

Would this remove the beneficial tannins from Indian Almond Leaves?

so that is a good question. I would think yes. But it really is for older setups

Fluval Clear Max Phosphate Remover 300g 3 X 100g Treats

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Description

💧 Clear water, clear mind — elevate your aquarium game!

TRIPLE POWER PACKS - Three 100g granule bags for extended, hassle-free phosphate removal
CRYSTAL CLEAR WATER - Transforms aquarium water clarity in just one week, boosting aquatic vibrancy
VERSATILE PLACEMENT - Use in filter or directly in water for flexible, easy maintenance
ODOR ALGAE CONTROL - Effectively reduces odors and phosphate-driven algae growth for a pristine tank
AQUARIUM FRIENDLY FORMULA - Safe for both freshwater and saltwater environments, keeping fish and plants happy

Fluval Clear Max Phosphate Remover is a 3-pack of 100g granule bags designed to treat up to 300 liters of aquarium water. It rapidly reduces phosphates, improving water clarity and reducing odors without harming fish or plants. Suitable for both freshwater and saltwater tanks, it offers flexible placement options and is trusted by thousands of aquarium enthusiasts for superior water quality.

Specifications

ASIN	B0002DHQIY
Best Sellers Rank	#35,342 in Pet Supplies ( See Top 100 in Pet Supplies ) #2,214 in Aquarium Accessories
Brand	Fluval
Brand Name	Fluval
Customer Reviews	4.6 out of 5 stars 5,068 Reviews
Global Trade Identification Number	00015561113489
Item Form	Granules
Item Type Name	Clear Max Phosphate Remover 300g - 3 x 100g - treats 3 x 100L
Item Weight	0.33 Kilograms
Item form	Granules
Item weight	0.33 Kilograms
Liquid Volume	100 Liters
Liquid volume	100 Liters
Manufacturer	Rolf C Hagen UK Ltd
Manufacturer Part Number	A1348
Model Number	A1348
Number of Items	1
Number of Packs	3
Pet Type	Fish
Target Species	Fish
UPC	015561113489
Unit Count	300 Grams
Unit count	300 Grams

Reviews

H**M

Great product from Fluval

I never used carbon in my aquarium. I decided to try this item from Fluval, and it actually work. The water became crystal clear more than anytime before in just a week time. The only problem I see, is that you have to replace the carbon bag each month, which is quite expensive. A Purigen bag will be an alternative, as it can last up to 6 month.

29.11.2022

F**S

Superior product

How fantastic this product is! Huge improvement to the water quality. Does not harm plants. Fish are exxtremely happy, energetic again.

22.05.2026

M**E

Parfait

Comme décrit, fait un bon travail, sac solide pour les filtreurs, peut s adapter a n importe quel filtreur

14.10.2024

V**V

Impeccable

Très bien

5.05.2026

P**E

Wer Kristallwasser haben möchte.

Sehr zu empfehlen, ich eine kleine Algenplage, war in wenigen Tagen erledigt.

1.08.2025

B**S

Resine

Ottimo prodotto

28.08.2026

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