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

⏳10-day slow dissolve

💧Treats up to 280 gallons

🛡️Effective algae control

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Description

💧 Keep your pond flawless and algae-free — because your oasis deserves the best!

TRUSTED SINCE 1951 - Backed by decades of expertise from Tetra, the leader in aquatic care solutions.
CRYSTAL CLEAR WATER - Effectively clears algae blooms to keep your ornamental pond pristine and vibrant.
EFFORTLESS MAINTENANCE - Simple, no-fuss application keeps your water feature looking flawless with minimal effort.
BROAD COVERAGE CAPACITY - One block treats between 30 and 280 gallons, perfect for various fountain sizes.
LONG LASTING ALGAE DEFENSE - Slow-release blocks dissolve over 10 days for continuous protection.

Tetra Pond Fountain Block is a slow-dissolving algae control tablet designed for ornamental fountains and containerized ponds. Each block treats up to 280 gallons of water, dissolving over approximately 10 days to prevent and clear algae blooms, ensuring crystal-clear water and a healthy aquatic environment. Ideal for pond owners seeking easy, effective maintenance without harming fish.

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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18830CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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