--- product_id: 66837404 title: "CrystalClear Algae D-Solv EPA Registered Pond Algaecide, 16 oz | Fast-Acting algae control for fountains & outdoor ponds containing koi & other fish, 16 oz treats 5,760 gallons." brand: "crystalclear" price: "174 zł" currency: PLN in_stock: true reviews_count: 8 category: "Crystal Clear" url: https://www.desertcart.pl/products/66837404-crystalclear-algae-d-solv-epa-registered-pond-algaecide-16-oz store_origin: PL region: Poland --- # Fast-acting algae control Copper-free, safe for koi & plants Treats up to 5,760 gallons CrystalClear Algae D-Solv EPA Registered Pond Algaecide, 16 oz | Fast-Acting algae control for fountains & outdoor ponds containing koi & other fish, 16 oz treats 5,760 gallons. **Brand:** crystalclear **Price:** 174 zł **Availability:** ✅ In Stock ## Summary > 💦 Clear your pond, not your schedule! ## Quick Answers - **What is this?** CrystalClear Algae D-Solv EPA Registered Pond Algaecide, 16 oz | Fast-Acting algae control for fountains & outdoor ponds containing koi & other fish, 16 oz treats 5,760 gallons. by crystalclear - **How much does it cost?** 174 zł with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/66837404-crystalclear-algae-d-solv-epa-registered-pond-algaecide-16-oz) ## Best For - crystalclear enthusiasts ## Why This Product - Trusted crystalclear brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Eco-Safe Formula:** No copper, protects your koi and ornamental plants 🌿 - • **Versatile Application:** Perfect for ponds, fountains, water gardens & aquariums - • **Effortless Maintenance:** Simple dosing keeps ponds crystal clear with minimal work - • **Rapid Algae Eradication:** Clears green water, string algae & blanketweed fast ⚡ - • **High Coverage Efficiency:** One 16 oz bottle treats up to 5,760 gallons 💧 ## Overview CrystalClear Algae D-Solv is a fast-acting, EPA-registered liquid algaecide designed to eliminate various algae types including green water, string algae, and blanketweed. Its copper-free formula ensures safety for koi fish and ornamental plants, making it ideal for ponds, fountains, and water gardens. With just 1 fl oz treating 360 gallons, a 16 oz bottle covers up to 5,760 gallons, providing an easy, effective solution to maintain crystal-clear water and reduce pond maintenance. ## Description Buy CrystalClear Algae D-Solv EPA Registered Pond Algaecide, 16 oz | Fast-Acting algae control for fountains & outdoor ponds containing koi & other fish, 16 oz treats 5,760 gallons.: Water Treatment - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Fast results - Works great! I’ve had trouble in past years with my numeral pond getting a lot of algae build up. It’s aerated but still gets brown/green from debris. This only takes a little bit per gallon and it clears quickly with no foam build up on the surface like other products I’ve used. Most of the sediment is at the bottom which is easy to clean out or leave depending on the look you want but the water is clear. Very easy to use to solve a big problem. Review: 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 they’d clean our pond… they used a pressure washer. A real no-no, as the spray is too harsh and washes off all the ‘good algae’. 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 didn’t touch the issue. It just got out of hand. Our pond is small – 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 couldn’t see the fish, or anything. Tried water changes – several. Added beneficial bacteria (unnecessary). No help. Finally ordered CrystalClear RapiClear Liquid Flocculent – 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 pond’s 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). ## Features - 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. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01N3UW3OR | | Best Sellers Rank | #1,265 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #7 in Water Garden & Pond Treatment | | Brand | CrystalClear | | Brand Name | CrystalClear | | Customer Reviews | 4.0 out of 5 stars 4,209 Reviews | | Included Components | CrystalClear Algae D-Solv - Registered Algaecide | | Item Form | Liquid | | Item Weight | 16 ounces | | Liquid Volume | 16 fluid ounces | | Manufacturer | Airmax | | Manufacturer Part Number | CC073-16 | | Model Number | CC073-16 | | Pet Type | Fish | | Target Species | Fish | | UPC | 813166021228 | | Unit Count | 16 Fluid Ounces | ## Product Details - **Brand:** CrystalClear - **Item Form:** Liquid - **Item Weight:** 16 Ounces - **Liquid Volume:** 16 Fluid Ounces - **Unit Count:** 16.0 Fluid Ounces ## Images ![CrystalClear Algae D-Solv EPA Registered Pond Algaecide, 16 oz | Fast-Acting algae control for fountains & outdoor ponds containing koi & other fish, 16 oz treats 5,760 gallons. - Image 1](https://m.media-amazon.com/images/I/61OLGoXPwaL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: My rocks are still covered in algae after two applications: any tips?** A: When using CrystalClear Algae D-Solv, make sure to clean the excess algae off the sides, ornaments, and rocks before adding this product. This will reduce the amount of decaying organic matter. Also, you will get the best results using this product in conjunction with vigorous aeration and then following up with beneficial bacteria. **Q: Is this product safe to use on water features that attract birds?** A: Sorry don’t know. Ask manufacturer **Q: How much for a 300 hondred gallon pond** A: Dilute 1 ounce of CrystalClear Algae D-Solv for every 360 gallons in a container of pond water. Pour the solution into the pond in an area with the greatest circulation. You will see the best results using Algae D-Solv in conjunction with vigorous aeration. **Q: I just have a small fountain, how much should I use for 4 gallons?** A: Guessing teaspoon. A small portio you’d use in a koi pond. Read instruction. Use a small % of that. We have 2 koi ponds 4x16x2 feet and 4 ft wide and 2 feet deep x 22 feet long. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Fast results *by K***E on July 16, 2026* Works great! I’ve had trouble in past years with my numeral pond getting a lot of algae build up. It’s aerated but still gets brown/green from debris. This only takes a little bit per gallon and it clears quickly with no foam build up on the surface like other products I’ve used. Most of the sediment is at the bottom which is easy to clean out or leave depending on the look you want but the water is clear. Very easy to use to solve a big problem. ### ⭐⭐⭐⭐⭐ It worked, it really worked! With one caveat. *by C***. on September 26, 2023* 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 they’d clean our pond… they used a pressure washer. A real no-no, as the spray is too harsh and washes off all the ‘good algae’. 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 didn’t touch the issue. It just got out of hand. Our pond is small – 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 couldn’t see the fish, or anything. Tried water changes – several. Added beneficial bacteria (unnecessary). No help. Finally ordered CrystalClear RapiClear Liquid Flocculent – 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 pond’s 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). ### ⭐⭐⭐⭐ Working but water not clear *by S***E on June 9, 2026* My pond is about 300,000 gallons and was full of blanket weeds so i took a risk and spend good money on 2 2.5 gallons cans. I used sprayer to spray it evenly on the water. Before that i manually removed 10 carts of weeds and spend at least 10 hours on that After 2 days i see that rest of the weeds got brown and after 5 days disappeared but water became very muggy and with oil film on surface. Probably max 2 foot visibility - that is why 4 stars because they told it will be crystal clear. May be it is from dead weeds on the bottom Only after couple of good rains it became more clear. Also i see that other kind of weeds are slowing down - will see in few weeks ## Frequently Bought Together - 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 - CrystalClear MuckOff, Natural Pond Muck Treatment, Water Garden, Fountain & Bird Bath Sludge Remover, Living Beneficial Bacteria Clarifier with Enzyme, Fish, Aquatic Animal, & Pet Safe, 24 Tablets - Summit Clear-Water Barley Straw Pond Treatment, 2-Pack, Treats upto 2000 Gallons, 1000 Gallons per Bale --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pl/products/66837404-crystalclear-algae-d-solv-epa-registered-pond-algaecide-16-oz](https://www.desertcart.pl/products/66837404-crystalclear-algae-d-solv-epa-registered-pond-algaecide-16-oz) --- *Product available on Desertcart Poland* *Store origin: PL* *Last updated: 2026-08-10*