does this bottle have the measuring window on the side?

......no you use the cap which is a measured amount

I have high levels of nitrates and ammonia, is this what id use to sort the problem?

Be careful not to upset your tank by doing a half water change. This can be too stressful for some fish. Best do a 20-25% water change more frequently. I have found this to be less stressful and I have 3 tanks. Always treat the water too.

This product balances the water in your aquarium which in turns allows you to not change your water as often. It reduces the levels of phosphates , stabilises the pH and KH levels and restores essential trace elements and minerals

Is this supposed to leave a white residue on the gravel, please?

The product has greenish particles when you first put it in, but your filtration system should be movingly the water around the tank enough so that it doesn’t sit on the gravel after the first 24hrs

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Tetra EasyBalance - long-term care for biologically healthy aquarium water and a reduced number of water changes, 500 ml (Pack of 1)

Product ID: 47985111

Details

Brand
Tetra
Item form
Liquid
Item weight
350 Grams
Liquid volume
500
Unit count
500.0

⏳Up to 6 months extended water change interval

💧Reduces water consumption significantly

⚖️Stabilizes pH & carbonate hardness (KH)

146.26 DT

Duties & taxes included

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Keep your aquarium effortlessly balanced and thriving—because your fish deserve the best!

NUTRIENT RICH FORMULA - Infuses essential vitamins, trace elements, and minerals for vibrant fish and plants.
SAFE VISIBLE ACTION - Harmless nitrate-reducing granules sink and work quietly beneath the surface.
EFFORTLESS AQUARIUM CARE - Say goodbye to monthly water changes and hello to more free time.
ECO FRIENDLY WATER SAVINGS - Cut down water usage while keeping your aquatic ecosystem thriving.
LONG LASTING WATER STABILITY - Maintain perfect pH and KH balance for up to half a year.

Tetra EasyBalance is a 500ml liquid treatment designed to stabilize essential pH and carbonate hardness levels in aquariums, reducing harmful phosphates and nitrates. It extends the interval between partial water changes up to six months, significantly lowering water consumption. Enriched with vitamins, trace elements, and minerals, it supports healthy fish and plants while simplifying maintenance, especially in soft water setups.

Specifications

ASIN	B0034YOE74
Best Sellers Rank	3,308 in Pet Supplies ( See Top 100 in Pet Supplies ) 29 in Aquarium Water Treatments
Brand	Tetra
Brand Name	Tetra
Country Of Origin	Germany
Customer Reviews	4.6 out of 5 stars 1,650 Reviews
Global Trade Identification Number	04004218143067
Item Form	Liquid
Item Weight	350 Grams
Item form	Liquid
Item weight	350 Grams
Liquid Volume	500 Millilitres
Liquid volume	500 Millilitres
Manufacturer	Spectrum Brands
Manufacturer Part Number	T166
Model Number	T166
Number of Items	1
Pet Type	Fish
Target Species	Fish
Unit Count	500.0 millilitre
Unit count	500.0 millilitre

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