API ALGAEFIX Algae Control – 118ml
API ALGAEFIX algae control effectively controls many types of algae in aquariums and will not harm your fish or plants when used as directed. You can use ALGAEFIX algae control as part of your aquarium maintenance routine to control the formation of new algae.
- Use 1 ml per 10 gallons or 5 ml per 50 gallons of aquarium water
- Repeat dose every three days until algae is controlled
- After algae growth is under control, use one dose per week for ongoing prevention
- Siphon or scrape any dead algae from the aquarium
| Usage Instructions | Frequency |
|---|---|
| Initial treatment | Every 3 days until algae is controlled |
| Preventive maintenance | Once per week |
| Caution | Do not use with freshwater crustaceans including shrimp, crabs, and lobsters |
FAQ
How much ALGAEFIX should I add to my aquarium?
Add 1 ml for every 10 gallons or 5 ml for every 50 gallons of aquarium water.
How often should I repeat the dose during algae control?
Repeat the dose every three days until algae growth is under control.
Can I use ALGAEFIX with shrimp or crabs?
No, do not use ALGAEFIX with freshwater crustaceans such as shrimp, crabs, or lobsters.

Katherine Howard –
I’ve used ALGAEFIX for two months now and it has significantly reduced algae buildup in my 55-gallon tank. The algae didn’t return after I started weekly dosing. My fish and plants seem unaffected. Easy to measure and apply.
Nicholas Oliver –
It works well for green algae. I added 5 ml for my 50-gallon tank and repeated every three days. After a week, the algae stopped growing. I now use one dose weekly to keep it under control. No issues with my fish.
Molly Rutherford –
Great product for a busy aquarist. I didn’t have time to clean the tank regularly, but ALGAEFIX helped keep algae at bay. The instructions are clear and the dosage is easy to follow.