What are the ingredients?

ACTIVE INGREDIENTS: Copper Sulfate pentahydrate 1.02%; 1-dimethylurea 0.51%OTHER INGREDIENTS: 98.47% NOTE: Ingredients taken from package label.

How long until you start to see the water clear up?

The length of time it takes to clear up the algae will depend on a number of things such as the overall water quality of the pond, the stocking level, your filtration, the amount of organic matter in the pond, and so forth. The more organic matter, the softer the water, the less effective and more time it will take. In a situation such as this, we recommend a partial water change initially, prior to dropping the blocks in. For more assistance, please contact the Tetra Consumer Relations Team at 1-800-526-0650.

Is the block supposed to disolve? its been in my pond for two weeks and still the same as when it went in.

No. That's why I like it. It gets smaller over time and takes about 3 - 4 weeks to disappear.

will the Tetra Pond Anti Algae Block work in a 40 gallon aquarium that has 2 turtles that are 30 years old. Will it harm them.

I use it in my goldfish pond. And my box turtles have access to it. No harm has come to either animal as long as the water is aerated. This product removes the oxygen from the water.

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Tetra Pond Block Controls Algae In Ornamental Fish Ponds, 4 Count

Tetra Pond Block Controls Algae In Ornamental Fish Ponds, 4 Count

Product ID: 2284042

Details

Brand
Tetra
Item Form
Tablets
Item Weight
5.6 ounces
Liquid Volume
100 gallons
Number of Packs
4

🌿Safe for ornamental fish ponds only

💧Treats up to 250 gallons per block

🧊Slow-release 30-day dissolve

233 DH

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Description

💧 Keep your pond pristine and your fish happy—because your oasis deserves the best!

TRUSTED LEGACY - Backed by 50 years of Tetra expertise, a must-have for discerning pond keepers.
POWER PACKED COVERAGE - Each block treats up to 250 gallons, perfect for medium-sized ornamental ponds.
EFFORTLESS MAINTENANCE - Replace blocks only after full dissolution—minimal hassle, maximum pond beauty.
TAILORED FOR YOUR OASIS - Formulated specifically for ornamental fish ponds, ensuring fish safety without harming your aquatic pets.
CRYSTAL CLEAR WATER ALWAYS - Slow-release blocks dissolve over 30 days for continuous algae control.

Tetra Pond Block is a slow-release algae control tablet designed for ornamental fish ponds, treating up to 250 gallons per block with a 30-day dissolution cycle. Not suitable for ponds with live plants, it offers an easy, effective solution to maintain clear, algae-free water, backed by Tetra’s 50-year legacy in aquatic care.

Specifications

ASIN	B0034CAYDO
Allergen Information	Gelatin Free
Best Sellers Rank	#14,895 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #50 in Water Garden & Pond Treatment
Brand	Tetra
Brand Name	Tetra
Customer Reviews	4.4 out of 5 stars 1,200 Reviews
Global Trade Identification Number	00046798167358
Included Components	1 x Controls Algae Growth In Ornamental Fish Ponds
Item Form	Tablets
Item Highlight	Clears Cloudy Water & Prevents Algae In Ornamental Ponds & Fountains, Slow-Release Blocks Dissolve Over 30 Days
Item Type Name	Tetra Pond Block 4 Count, Controls Algae Growth In Ornamental Fish Ponds
Item Weight	5.6 ounces
Liquid Volume	100 gallons
Manufacturer	Tetra
Manufacturer Part Number	16735
Model Number	16735
Number of Items	1
Number of Packs	4
Pet Type	Fish
Target Species	Fish
UPC	046798167358
Unit Count	1 Count
Warranty Description	See label

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233 DH

Duties & taxes included

In stock

Sold byAmazon MoroccoDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Morocco.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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