CrystalClear Algae D-Solv Pond Algae Control, Fast-Acting EPA Registered Algaecide, Use in Fountains & Outdoor Ponds Containing Koi & Other Fish, Treats 5,760 Gallons, 16 Ounces
$16.99
Price: $16.99
(as of Oct 24, 2025 12:29:43 UTC – Details)
From the brand
About CrystalClear
The Proven Solution in Water Garden Treatments
Natural. Clear Water. Guaranteed.
CrystalClear has been the proven solution and market leader in water garden treatments for over 20 years, producing unrivaled algae control solutions, natural water treatments, fish care products, and diffused aeration.
CrystalClear is an American company founded with a passion for improving how pond owners care for their ponds. The success of CrystalClear is a result of several proprietary biological treatments and EPA registered algaecides.
Solutions for Small Ponds
Product Dimensions : 2.5 x 2.5 x 8.5 inches; 1 Pounds
Item model number : CC073-16
Date First Available : December 15, 2016
Manufacturer : Airmax
ASIN : B01N3UW3OR
Best Sellers Rank: #4,119 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #8 in Water Garden & Pond Treatment
Customer Reviews: 4.1 4.1 out of 5 stars 3,925 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
Highly Effective Algaecide: Fast-acting, broad-spectrum algae remover effective in controlling many different types of algae including green water algae, string or hair algae, and blanketweed.
No More Green Water: Perfect for controlling existing algae blooms and getting your pond back on track to being clean and clear. An easy-to-use alternative to draining and scrubbing your entire pond.
Will Not Harm Koi & Ornamental Plants: Algae D-Solv contains no copper and will not harm fish or decorative plants when used as directed. Before using algae treatment, ensure pond has aeration.
Easy Application: Apply 1 fl oz Algae D-Solv per 360 gallons of water. Once pond algae growth is under control, weekly doses will control algae growth and reduce pond maintenance.
Variety of Applications: A great algae maintenance solution for fountains, self-contained aquariums, backyard ponds, lined water gardens, and decorative ponds without any outflow.
Customers say
Customers report that the algaecide works quickly, with ponds clearing up within a day, and effectively controls algae, particularly hair algae. The product receives positive feedback for its quality and ease of use. Regarding safety, while some customers say it’s safe for fish and plants, others warn it’s not safe for humans and domestic animals. Opinions on value for money are mixed, with some finding it a great value while others consider it a waste of money.
8 reviews for CrystalClear Algae D-Solv Pond Algae Control, Fast-Acting EPA Registered Algaecide, Use in Fountains & Outdoor Ponds Containing Koi & Other Fish, Treats 5,760 Gallons, 16 Ounces
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Charlee L. –
It worked, it really worked! With one caveat.
This was recommended to me to The Pond Guy. We had some extensive work done on our pond this past spring, and the people who did the work also said theyâd clean our pond⦠they used a pressure washer. A real no-no, as the spray is too harsh and washes off all the âgood algaeâ. A plain garden hose would have sufficed and been far better. Anyway, flash forward 8 weeks and I had the worst string algae ever. So thick⦠I used a stick to pull up globs every morning, and that didnât touch the issue. It just got out of hand.Our pond is small â only 500 gallons. I used 1-1/2 ounces – first I cleaned a bucket very well, then dipped it into my pond and collected a bit of pond water. Then I added the Algae D-Solv to the pond water, swished to mix, and gently poured it into our pond. I repeated this every 3 day, for a total of 3 times. After the 3rd day of the 3rd treatment (12 days later), there was NO string algae. None. Of course, throughout the treatment I did have to clean the pond, the filter, and skimmer daily. Also, I have 2 falls, and added 4 bubblers while I treated the pond, for added aeration, which helps.Unfortunately, it left my pond very turbid. I couldnât see the fish, or anything. Tried water changes â several. Added beneficial bacteria (unnecessary). No help. Finally ordered CrystalClear RapiClear Liquid Flocculent â one treatment did the job.After that, I occasionally treat the string algae, once, which does the trick, and several days later add the flocculent.I have comets and shubunkins, and because I know my pondâs correct volume, they were never harmed, nor were my water lilies, hyacinths, or other pond and bog plants. I also had a couple comet fry, and they are fine.Not a fan of adding anything to my pond. I’m a big believer in letting nature do it’s thing. But sometimes the pond needs a bit of human intervention to keep it healthy.UPDATE: The weather has cooled off here, and this product does not work as well in cool/cold weather, BUT it does work – you need to give it time. My string algae started to return so I did 3 treatments, adding the D Solv every 3 days. After the 3rd treatment I just gave the pond a few extra days and sure enough, it’s totally clear of string algae once again (average nighttime temps are in the low 50’s and I’ve stopped feeding the fish, of course).
John Hobbs Sr –
Crystal clear algaecide.
Excellent product, works well. Exceeds advertised qualities as noted on product Great product, I will buy it again.
carol cisney –
Use
Easy to use and worked well
John Smith –
Looking good so far!
So far so good with this product. I have had a lot of problems with algae in my water features. I put this is one week ago and still have no algae.
Laura C. –
Not so great
Two months ago, I wouldâve come on here and given this product a five star review. It seemed to be the best product ever. I put it in my fountains, and the water was crystal clear. I have garden fountains, not a Koi pond, garden pond, or birdbath. I was happy because this product did not kill my landscape plants or the potted plants I have around my fountains. That was a real plus. For years, I have used chlorine bleach which is very effective, but it can be harmful to animals and it can also kill any plants around the fountain from the splatter of water. I saw this product and bought it and it worked wonderfully the first time. I ordered it a second time and got a bigger bottle. I guess it must be because of hot weather. The first bottle was in the spring time and now itâs the heat of summer. The algae is out of control in my fountains. Iâve had to scrub them and put bleach in them to get them clean, drain them, do everything I could to clean them up, and add this product and it just cannot keep the algae gone. After I struggled with it, I saw some online reviews and I did not realize it but this product is toxic to animals and humans. I shouldâve paid closer attention. The label on the bottle says that; harmful to humans and pets. They say in the description that it will not harm Koi fish. I donât have any fish but other people wrote reviews and said the product killed their fish. Then I saw someone mention that this product was toxic to animals. I have cats that sometimes drink out of my fountains, and I have seen birds and butterflies and bees drink from the fountain and I did not want anything that would make them sick or die. I do not recall anything in the online description saying that it was toxic to humans or animals other than just saying it was not harmful to fish. The label says it, but the description online did not, and so I returned the last unopened bottle that I had purchased because of its in ineffectiveness in hot weather and the toxicity to humans and Animals .
Ssilver4 –
Great product
Great product worked as described.
Ricky C. Venable –
Algae gone
Product works as described and isvery eay to use
Robert –
Good for maintaining but not for major cleaning
I found out through trial and error that while it will eventually give you a clear small fish pond it is not the mosr effectively product for getting pond cleared for the first time. I have a small garden pond of perhaps 150-200 gallons that gets direct sunlight for at least 8 hours a day and it had gotten ahead of me. I wanted something that wouldn’t harm my recent planting of grasses and papyrus so I couldn’t use something like pool chlorine. Over a period of about 8-10 days it took an entire 16 oz. bottle to make a serious dent and only now is the pond looking perhaps 80% cleaned.It doesn’t seem to bother the plants and I suspect once I get it cleared the product will keep it that way with mush smaller treatments and that’s a good thing. But if you have a really green pond/pool of any size do as much cleaning as you can manage throuigh other means before using this to maintain it and you’ll be happier. If you must remove as much of your plants and fish as you can safely, shock the pond, wait a couple of days and then reintroduce the plants and fish and use this product to keep it clear.