How to Keep Your Aquarium Algae-Free: Tips from the Experts
Algae is a fact of life in aquariums. A little bit is perfectly normal, and in some cases, even beneficial. But when it starts covering your glass, rocks, or decorations, it can quickly turn your beautiful setup into a murky mess.
At PureAquatics, we've seen every type of algae issue, from the mild green film on glass to stubborn outbreaks of black beard algae. The good news? With the right approach, algae can be kept under control without harsh chemicals or endless scrubbing.
Here are our expert tips for preventing and managing algae in your tank.
1. Don't Overfeed Your Fish
Excess food breaks down into waste, which releases nutrients (like nitrates and phosphates) that algae thrive on. Feed only what your fish can eat within 2–3 minutes, and remove any leftovers.
2. Manage Your Lighting
Algae loves light. Leaving your tank lights on too long can encourage overgrowth.
- Stick to 8–10 hours of light per day.
- Use a timer so your fish (and algae) stay on a schedule.
- If your tank gets direct sunlight, consider moving it or adding a background to reduce exposure.
3. Keep Up with Water Changes
Regular water changes dilute the nutrients algae need to grow. Aim for:
- Freshwater tanks: 20–30% weekly
- Marine/Reef tanks: 10–15% weekly
4. Add the Right 'Clean-Up Crew'
Some fish and invertebrates naturally graze on algae and can help keep it in check:
- Freshwater: Siamese algae eaters, bristlenose plecos, Amano shrimp
- Marine/Reef: Turbo snails, hermit crabs, tangs
5. Test and Balance Your Water
Algae thrives in unstable water conditions. Regular testing helps you spot problems before they escalate. Keep an eye on:
- Nitrate and phosphate levels
- pH stability
- Ammonia/nitrite (should always be 0)
When to Call in the Experts
Sometimes algae problems are too stubborn to solve with DIY fixes, especially in reef tanks, where balance is delicate. That's the perfect time to consider one of our tailored maintenance services, from ongoing Maintenance Subscriptions with regular water testing, algae management, and health checks, to One-Off Deep Cleans designed to reset neglected or struggling aquariums.
Get Professional Help with Algae Problems
Algae doesn't have to be the enemy. With the right care, it's just a minor part of a thriving ecosystem. By staying on top of feeding, lighting, and water quality, you can enjoy a sparkling aquarium that shows off your fish at their best.
Contact us today to discuss your algae concerns, we're here to help.