The Unwanted Guest: Why Algae Appears in Your Aquarium
Every aquascaper, from beginner to pro, has faced the battle against algae. Whether it’s the stubborn Black Brush Algae (BBA), long stringy Hair Algae, or a green fuzz, it’s the number one problem that can ruin the beauty of a planted tank.
But here’s the most important thing to know: Algae is a symptom, not the disease.
Algae appears when there’s an imbalance in your aquarium. This imbalance is almost always one of three things:
- Too much light: (Either too intense or on for too long).
- Too many nutrients: (Often from overfeeding, fish waste, or decaying plants).
- Not enough CO2 / Unhealthy Plants: When your plants aren’t growing robustly, they can’t outcompete the algae for nutrients.
Fixing these root causes is the long-term solution. But what do you do right now to get rid of the ugly, existing algae?
That’s where a two-pronged attack comes in. We’re going to use two of the most effective tools in the hobby: 2Hr Aquarist APT Fix for the immediate “clean-up” and Seachem Flourish Excel for the long-term “prevention and plant boost.”
Product 1: The “Special Ops” Killer – 2Hr Aquarist APT Fix
What It Is: APT Fix is a dedicated, specialized algaecide. Think of it as a smart, targeted solution for active infestations.
What It Does: Its active ingredient, 3% Epoxy Aldehydes, is incredibly effective against the most stubborn algae, including BBA, hair, string, and fuzz algae. The best part? It’s copper-free and biodegrades completely within 12-24 hours, leaving no harmful residue.
When to Use It: Use this when you have visible, established algae patches on your plants, hardscape (wood or rocks), or equipment.
How to Use It (Spot-Dosing Method):
- Safety First: Turn off your aquarium filter and any water pumps. This is crucial.
- Dose Correctly: Using the included pipette, spot-dose the APT Fix directly onto the algae-infested areas. The recommended dose is 1ml per 10L of aquarium water.
- Wait: Let the product sit and work its magic for 10-15 minutes.
- Restart: Turn your filter and pumps back on.
- Observe: Within a few days, you’ll see stubborn BBA turn red or white, and hair algae will begin to dissolve. This is a sign it’s dead and your clean-up crew (shrimp and snails) will often finish the job.
- For Heavy Infestations: If your tank is heavily infested, you can exceed the 1ml/10L dose, but you must perform a 50% water change immediately after the 15-minute waiting period.
Product 2: The “Plant Booster & Algae Suppressor” – Seachem Flourish Excel
What It Is: Seachem Flourish Excel is a bioavailable organic carbon source for your plants. In simple terms, it’s “liquid CO2.”
What It Does (The Dual-Action):
- Plant Fertilizer: Its main job is to provide your plants with the carbon they need to grow strong and healthy. And remember: healthy plants outcompete algae.
- Mild Algaecide: Aquarists discovered it has a powerful secondary effect: it’s highly effective at killing certain algae, especially Black Brush Algae (BBA).
When to Use It: Use this as part of your daily or weekly maintenance routine to boost plant growth and prevent new algae from taking hold. It can also be used to spot-treat small, localized BBA outbreaks.
How to Use It:
- For Maintenance & Prevention: Add the recommended dose (found on the bottle) to your tank daily or every other day. This will keep your plants strong and make the environment hostile to algae.
- For Local Spot-Treatment (“Fogging”):
- Turn off your filter.
- Draw the daily dose of Excel into a syringe (without a needle).
- Slowly “fog” the liquid directly onto the BBA.
- Wait 5-10 minutes.
- Turn your filter back on. The treated BBA will often turn pink or white in a few days, signaling it’s dead.
Your Algae-Fighting Strategy: Using Them Together
Don’t use both products on the same day. Here is the most effective strategy:
Step 1: The Clean-Up (Day 1)
- Perform your regular weekly water change.
- After the water change, perform a spot-treatment with APT Fix on all visible algae. Follow the “filter off” method described above. This is your heavy-hitting attack.
Step 2: The Maintenance & Prevention (Starting Day 2)
- The day after your APT Fix treatment, begin your daily dosing regimen of Seachem Flourish Excel.
- This will boost your plants, helping them recover and grow, which in turn starves out any new, potential algae spores.
Step 3: The Long-Term Fix (Ongoing)
- Address the root cause!
- Check your light: Is it on for more than 8 hours? Is it too strong?
- Check your nutrients: Are you overfeeding? Do you have good water flow?
- Stay consistent: Continue your weekly water changes and your daily Excel dosing.
Important Safety & Best Practices
To be a responsible aquarist (and to meet Google’s guidelines), we must be clear: these are powerful products. Always use them as directed.
- Never Overdose: More is not better. Overdosing can harm your fish, shrimp, and plants.
- Oxygen is Key: Excel, in particular, can consume oxygen when it breaks down. Always dose in the morning when the lights first come on, and ensure you have good surface agitation (from a filter outflow or aerator) to keep the water oxygen-rich.
- Watch Your Livestock: If you ever see fish gasping at the surface, it’s a sign of low oxygen or stress. Perform an immediate 50% water change.
- Plant Sensitivity: Some sensitive plants (like Vallisneria, Mosses, or Liverworts) can be sensitive to liquid carbon and algaecides. If you have these plants, you may want to start with a half-dose to see how they react.
- Read the Label: The manufacturer’s instructions are your primary source of information. Always read them before use.
Conclusion: Take Back Your Tank
Algae doesn’t have to be a tank-ending disaster. With the right tools and the right strategy, you can win the war.
Use 2Hr Aquarist APT Fix as your “shock and awe” tool to eliminate existing infestations, and use Seachem Flourish Excel as your “daily shield” to build a strong, resilient, and algae-free planted tank.
Ready to reclaim your crystal-clear aquarium?
