EASYCARE 10064 Algatec Super Algaecide-Clarifier, 64 Fl. Oz
✅ PROS
- Dual-action formula kills algae AND clarifies water in one pour — most competitors only do one or the other
- 64-ounce bottle treats up to 64,000 gallons, so a single bottle covers most residential in-ground pools
- Copper-free chemistry won't stain plaster or fiberglass liners, a common issue with cheap algaecides
❌ CONS
- Not a 'shock' replacement — you still need chlorine shock for severe green water, and this works best as maintenance
- Some users report foaming if you over-pour; follow the dosage line carefully, especially in hot tubs or small pools
The Verdict
The Short Version: If your pool is starting to look a little green around the edges, this is the product you grab before it becomes a swamp.
Pool maintenance is a grind. You check pH, scrub walls, empty skimmer baskets — and then the water still turns cloudy. The EASYCARE Algatec Super Algaecide-Clarifier is designed to knock out two problems at once: live algae and the dead debris that makes water look like pea soup.
What You Actually Get
One 64-fluid-ounce jug. That’s it. No measuring cup, no test strips, no fancy applicator. The label says 1 ounce per 10,000 gallons for maintenance, or 2 ounces per 10,000 gallons for an initial kill dose. At that rate, this jug covers a 20,000-gallon pool for roughly 16 treatments — a full season for most homeowners.
As shown in the product image, it’s a standard translucent white jug with a child-resistant cap. The liquid itself is a pale blue-green, which makes sense given the active ingredient is a quaternary ammonium compound.
Performance: The Real-World Test
Here’s where this product separates itself from the bargain-bin algaecides. The dual-action formula uses a cationic surfactant that breaks down algae cell walls while simultaneously bonding with dead organic matter so your filter can catch it. In practice, that means you pour it in, run the pump for 24 hours, and the water clears noticeably.
Customer feedback backs this up. One verified buyer wrote: “I was skeptical because my pool had been neglected for two weeks. Dumped in the initial dose, brushed the walls, and by the next morning the water was visibly clearer. Two days later it was swim-ready.”
Another reviewer with a 30,000-gallon vinyl pool noted: “I’ve used this for three summers now. It’s my go-to for preventing algae before it starts. I add it every Sunday with my chlorine, and I haven’t had a green pool since.”
The copper-free formulation deserves special mention. Copper-based algaecides are harsh on metal components and can leave blue-green stains on light-colored plaster. This one avoids that entirely.
Where It Falls Short
Let’s be honest about limitations. This is a preventive and mild-treatment product, not a rescue weapon. If your pool is already dark green and you can’t see the bottom step, you need to shock with liquid chlorine or calcium hypochlorite first. Algatec will help afterward, but it won’t resurrect a swamp.
A few reviewers mentioned foaming. If you accidentally pour in double the recommended dose — easy to do with the open pour spout — you’ll get surface foam that takes time to dissipate. Measure carefully.
One more note: this product works best in pools with a clean filter. If your cartridge or sand filter is clogged, the clarifier has nowhere to push the dead algae. Backwash first.
Who Should Buy This
- The proactive pool owner who adds chemicals on a schedule and wants to avoid algae problems entirely.
- The new pool owner who needs a simple, forgiving product that does two jobs without complicated testing.
- Anyone with a plaster or fiberglass pool who’s worried about staining from copper-based alternatives.
Skip it if you’re dealing with a black-green swamp, you have a tiny above-ground pool under 5,000 gallons (you’ll waste most of the bottle), or you expect this to replace chlorine entirely.
FAQ: Real Questions Shoppers Ask
Q: Can I use this with a saltwater pool? A: Yes. The quaternary ammonium compound is compatible with salt chlorine generators. Just follow the same dosage rates.
Q: How often should I add it? A: Weekly during swim season is the standard recommendation. If you’re recovering from an algae bloom, do an initial double dose, then return to weekly maintenance.
Q: Does it have a strong chemical smell? A: No. It has a very mild, almost soapy scent that dissipates quickly. Much less offensive than chlorine shock.
The Verdict
Buy it if you want an easy weekly maintenance product that handles algae prevention and water clarity in one step. The 64-ounce bottle is a solid value, the copper-free formula protects your pool surfaces, and the 4.4-star rating across 220 reviews reflects consistent real-world performance.
Skip it if you’re looking for a miracle cure for an already-green pool. That requires shock first, and this product is best used as the follow-up or the preventive.
Rating: 4.2/5 — It does exactly what it claims, with the only real downsides being misuse-related foaming and the need for pre-shocking in severe cases. For the price per treatment, it’s one of the better values in pool maintenance.
Note: Always test your water chemistry before adding any algaecide. Proper pH and free chlorine levels make any algaecide work significantly better.
Where to Buy
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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.