can this clear a green tank ?

This product will not remove the green algae from the tank. It will be better to clean the tank, and then use green away, or algae minus products in the freshly cleaned tank. those products will keep the algae from growing. This product will make the water more clear by combining small contaminating particles in the water and then those gets filtered out.

Can this be used with an under gravel filter

I have an under gravel filter & use Tetra Crystal Water. Have used it for 3 years without any problem. Hope this helps.

Will this help with white bits float in my fresh water tropical tank

My not tropical fish sorry can not answer your question.

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Tetra Crystal Water Clarifier, 100 ml

Product ID: 50040062

Details

Brand
Tetra
Item form
Liquid
Item weight
0.1 Kilograms
Liquid volume
100
Number of Packs
1

🌿Safe for all freshwater fish & plants

💧Crystal clear water within 6-12 hrs

⏱️Fast acting: visible clarity in 2-3 hrs

3560 kr

Duties & taxes included

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Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💎 Transform your aquarium into a crystal-clear masterpiece—don’t let murky water hold you back!

RAPID CLARITY BOOST - Experience visible water clarity in just 2-3 hours—because your aquarium deserves the spotlight.
COMPACT CONVENIENT - Available in 100ml and 250ml sizes—perfect for every tank, from desktop to deluxe setups.
POWERFUL PARTICLE BINDER - Binds microscopic particles into filterable clusters, eliminating cloudiness without harsh chemicals.
UNIVERSAL FRESHWATER SAFETY - Formulated to be gentle and safe for all freshwater fish and plants, ensuring a thriving ecosystem.
ULTIMATE CRYSTAL CLEAR FINISH - Achieve pristine, sparkling water within 6-12 hours and keep your aquatic world Instagram-ready.

Tetra Crystal Water Clarifier is a fast-acting liquid treatment designed to clear clouded freshwater aquariums by binding tiny particles into larger ones that your filter can easily remove. Safe for all freshwater fish and plants, it delivers visible results within 2-3 hours and full clarity in 6-12 hours, available in convenient 100ml and 250ml bottles.

Specifications

ASIN	B005P7ES8S
Allergen Information	Allergen-Free
Best Sellers Rank	17,122 in Pet Supplies ( See Top 100 in Pet Supplies ) 187 in Aquarium Water Treatments
Brand Name	Tetra
Customer Reviews	4.6 4.6 out of 5 stars (393)
Global Trade Identification Number	04004218144071
Included Components	See Description
Item Form	Liquid
Item Type Name	Tetra CrystalWater, for Crystal Clear Water Fish Tank, 100 ml
Item Weight	0.1 Kilograms
Liquid Volume	100 Millilitres
Manufacturer	TEZSY
Manufacturer Part Number	T272
Model Number	T272
Number of Items	1
Number of Packs	1
Pet Type	Fish
Product Warranty	Manufacturer Fault
Target Species	Freshwater Pond Fish
Unit Count	100.0 millilitre

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