Do you have to clean out the algae before using this product?

Thank you for your question, Donna! We do recommend cleaning it out, if possible, as this product is more of a preventative product. It doesn't work as well at killing algae that is present as it does at preventing it from occurring. Customers rave about this product when put in prior to algae growth. So if you clean out your fountain first, then refill it and drop this in, you should not have algae the rest of the season.

I have a lot of birds drinking from my fountain now, are the Flountain blocks safe for wildlife?

Customer feedback over the years has indicated that these are safe for birds. However, we want you to be aware that we have not tested them specifically for this purpose, and cannot guarantee the safety of the birds. They do dissolve slowly, and are very diluted in the fountain.

will this item harm birds drinking from the fountain?

Birds did drink from fountain but have no way of knowing if it harmed them. Does say not to use with plants and may be toxic to fish. Was getting lots of green algae. Started using PHYSAN 20. Just a few drops each week. Water is so clear and haven't had any algae. Water will foam up when more water is added but doesn't last. Always have a block in the fountain as a back up

Do you place the block on the fountain "floor" or do you need to place it in a floating container?

Thank you for your question. The Tetra Pond Fountain Block is typically placed at the bottom of a fountain reservoir where it can gradually dissolve to control algae growth. If you have additional questions you can call Pond and Garden Depot toll free at 1-866-305-5459. Sincerely, Keith H. Customer Service

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Tetra Pond Block Controls Algae in Ornamental Fish Ponds, 6 Count

Product ID: 19629336

Details

Brand
Tetra
Item Form
Tablets
Item Weight
0.27 g
Liquid Volume
10 ml
Unit Count
2.88 Ounce

⏳Slow 10-day dissolve

💧Treats up to 280 gallons

🛡️Effective algae control

4228 som

Duties & taxes included

In stock

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Description

💧 Keep your pond flawless and your fish front-row ready!

TRUSTED SINCE 1951 - Backed by decades of expertise from Tetra, the leader in aquatic care.
BROAD COVERAGE POWER - One block treats between 30 and 280 gallons, perfect for various pond sizes.
EFFORTLESS MAINTENANCE - Simple one-block dosing system keeps your ornamental pond pristine with minimal effort.
LONG LASTING ALGAE DEFENSE - Blocks dissolve slowly over 10 days for continuous protection.
CRYSTAL CLEAR WATER ALWAYS - Effectively clears algae blooms to keep your pond vibrant and fish visible.

Tetra Pond Block is a slow-release algae control solution designed for ornamental fish ponds and fountains. Each block dissolves over approximately 10 days, treating up to 280 gallons of water to prevent and clear algae blooms, ensuring crystal-clear water and a healthy aquatic environment. Ideal for containerized ponds without live plants, it offers an easy, reliable way to maintain pond beauty and fish visibility.

Specifications

ASIN	B003DASH9U
ASIN	B003DASH9U
Allergen Information	Gelatin Free
Best Sellers Rank	#44,329 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #133 in Water Garden & Pond Treatment
Brand Name	Tetra
Customer Reviews	4.2 4.2 out of 5 stars (1,603)
Date First Available	March 20, 2010
Department	Unisex-Adult
Global Trade Identification Number	00046798167372
Included Components	TetraPond Anti-Algae Blocks for Fountains, 6-Count
Item Form	Tablets
Item Type Name	Tetra Fountain Block 6 Count, Controls Algae Growth In Ornamental Fountains
Item Weight	0.27 g
Item model number	16737
Liquid Volume	10 ml
Manufacturer	Tetra
Manufacturer	Tetra
Manufacturer Part Number	16737
Model Number	16737
Number of Items	1
Pet Type	Fish
Product Dimensions	3.63 x 1.63 x 5.5 inches; 0.01 ounces
Target Species	Fish
UPC	707005178078 046798167372
Unit Count	2.88 Ounce
Warranty Description	See label

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