Pool & Spa Products 71114 1-Quart Strike Out Algaecide

This algecide works great! Keeps pool sparkling clear.

Great Stuff Best Price kills all your algae within 48 hours and more helps save on chlorine too follow all directions for best results

Great for maintenance and first of season I’ll do a whole bottle, it kills quick and see results in days, cost is good same as stores, as they don’t always deliver, but use the amount weekly and your good to go, safe for family to swimming Soon after use,

I cringe when it’s time to reorder chemicals because of the expense but this stuff earned a permanent spot on my must-have list for regular pool maintenance. My wife and I moved into our house with ~32,000 gallon pool 5 years ago; first time pool owners. Most of the first year I had no problem keeping it clean but after a particularly heavy storm one day, and delay in being able to clean up the leaves and small branches that blew in, the organic debris threw the chemical balance out of whack and we found ourselves with a green pool. I knew I needed an algaecide and promptly treated using a brand I found at a local store but unfortunately it barely made a difference. Did a little better searching and found GLB on amazon and decided to try it because of the copper ingredient, I knew copper will kill a full grown tree and stumps so figured it should have an impact on algae. I followed the directions on the bottle and within 24 hours our pool was clear with no trace of algae. Ever since I’ve made sure to have a full bottle of this on hand for emergencies and a second for weekly preventative treatments. For weekly treatments I use very little, I just eyeball it but it’s probably about 1/2-1oz poured in front of the water return in our deep end. Following this routine our water has stayed clear ever since, we did have some minor wall algae and on our steps a couple times over the years due to neglected chlorine levels but a doubled dose of my usual GLB weekly treatment directly in the area of the algae breakout has wiped it out by the next day every time. Again, this stuff isn’t cheap but in my applications it has worked reliably every time.

Last year I battled the dreaded black algae and tried everything at the pool store. No luck. As a last resort I ordered this stuff and it seemed to be working. This summer I have used nothing but the GLB and have had no major issues. I use it about every other week and have only had mild algae that easily brushes off unlike last year that was a steel brush three times a week. I am now convinced that pool stores only sell stuff that cures one problem and creates another. I'd recommend this stuff and would give it 5 stars but like I said, very light algae persists even a day or two after applying.

Tried others. This is the real deal.

With the hot weather we've been having this product stops my pool water from turning cloudy and makes it sparkle. Thanks for a great product.

The product works, but it’s really more for pools. It’s highly concentrated and such a tiny amount is required for a spa that it is difficult to measure correctly. It’s not a bad product, but it should not be advertised as being for spas. I have a small hot tub and I would have ordered something else if I would have known this.