Tetra Pond Block – Bulk (50pc Jar)
Time-release control helps manage algae growth and reduces green water and string algae. Each block treats up to 250 gallons of pond water. Features simple dosing with block technology for easy and consistent use.
| Product Details |
|---|
| Brand: United Pet Group – Spectrum |
| Item Number: ATS16310 |
| Package Quantity: 50 pieces |
| Each Block Treats: Up to 250 gallons |
FAQ
How often should I use the Tetra Pond Block?
Use one block per 250 gallons of pond water. The exact frequency depends on pond conditions and algae activity, so monitor water clarity and adjust as needed.
Can I use this block in a small pond?
The block is designed for ponds up to 250 gallons. For smaller ponds, use a proportionally reduced amount or consider a smaller size product.
Is the block safe for fish and plants?
Yes, the Tetra Pond Block is safe for fish, plants, and beneficial pond organisms when used as directed.

Oliver Oliver –
This block has made a big difference in reducing green water in my 300-gallon pond. It’s easy to use and the algae control is steady over time. No fish stress or plant damage noticed.
Carl Cameron –
Works well for string algae. I used one block every 4 weeks and saw improvement in water clarity. The packaging is clear and the dosing is simple.
Anne Wallace –
Great value for the bulk pack. I’ve used it for three months now and the water stays clearer with less maintenance. My fish seem healthy and the plants are thriving.