Best in 7 days
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- USA
- CAN
Ships within 48 hours · Estimated delivery Sep 11 - Sep 16
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Crystal Blue 15 Lb. Copper Sulfate Smart Crystals 6-Acre Coverage Area Moss & Algae KillerEffectively controls most types of algae. Apply by casting copper crystals over floating algae mats, dissolve in water, and spray, or place crystals in porous bag and drag behind boat. Treat a portion of the pond at a time to prevent oxygen depletion.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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Best in 7 days
Best in 7 days
Best in 7 days
Best in 7 days
4.5 ★★★★★
Based on 1677 reviews
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Product Reviews
★★★★★ 5
Full Function Economic watch
Color: Gray/Digital/Gray
Best Watch Ever. I have had one for over 20 years. Waterproof. 3 Time Zones if you travel, Stop Watch....timers Alarms.... SIMPLE AND KEEPS GREAT TIME.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 21, 2026
★★★★★ 4
Great watch
Color: Gray/Digital/Gray
Great everyday watch—lightweight, easy to read, and does everything I need without being complicated.
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Reviewed in the United States on April 7, 2026
★★★★★ 5
Very nice watch.
Color: Black/Digital/Black/Yellow
Very nice watch.
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Great Multi-Function Watch
Color: Gray/Digital/Gray
I absolutely love my Timex Ironman watches. I have had many over a very long period of time.
Wonderful set of functions for the price.
Very affordable.
Easy to use. Lasts a long time. Very easy to read in standard lighting. I like the Indiglo when needed, but do not use it too often.
Absolutely love the ability to set a repeat timer to remind me to do something at a fixed interval, or to keep me on task for a fixed period of time.
Great to be able to set three independent alarms.
Potential to capture a huge number of splits with the stopwatch.
I purchased this watch to replace a similar model with a dead battery. I have replaced batteries in the past, but it is quicker and easier to buy a replacement watch. I am saving my old watches for that day in the future when the Ironman model may no longer be available. I expect this will be my watch of choice for the rest of my life.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Just fine if you have simple needs...
Color: Black/Digital/Black/Green
Exactly what I needed: a cheap, durable wrist watch. The only thing it was lacking were instructions, but about 5 minutes of messing with the buttons got it set up
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Reviewed in the United States on May 19, 2026
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