If your pond water’s turned green, smells off, or looks like a slimy mess, you’re probably dealing with algae. It’s one of the most common issues pond owners face—and if left unchecked, it can take over fast.
At Just Add Water, we help homeowners keep their ponds clean, clear, and under control. Regular maintenance is the key to avoiding costly cleanups, dead fish, or a complete system breakdown. This guide covers what causes algae, how to spot it early, and most importantly—how we can help you prevent it.
Why Algae Happens
Algae grows fast in the right conditions: still water, warm temperatures, plenty of sunlight, and excess nutrients. It’s a natural part of any aquatic environment—but when those factors combine, things can spiral out of control.
Nutrients like nitrogen and phosphorus often come from:
- Fish waste and uneaten food
- Runoff from nearby lawns or gardens (especially if fertilizer is used)
- Decaying leaves and other organic debris
Once algae shows up, it can multiply quickly—especially during spring and summer. The warmer the water, the faster it grows. Without routine cleaning, filtration, and water movement, algae will dominate the ecosystem, choking out plants and stressing your fish.
Common Types of Algae
Not all algae are the same. Each type grows in different ways and needs its own control strategy. Here’s a look at the most common ones you might see in your pond:
Green Water (Planktonic Algae)
This is what turns your pond into pea soup. It’s made up of tiny, free-floating algae cells that cloud the entire water column. You can’t scoop it out—it’s microscopic. Filtration, UV clarifiers, and beneficial bacteria are key to clearing it up.
String Algae (Filamentous Algae)
Looks like long strands or mats that stick to rocks, waterfalls, and plants. It can be removed manually, but it comes back quickly unless nutrient levels are addressed.
Blue-Green Algae (Cyanobacteria)
Not technically algae, but it behaves like it—and it’s toxic. It forms thick mats or scum on the surface and can release harmful toxins. Pets drinking from the pond can get sick. This is a serious issue that needs expert treatment.
Chara and “Good” Algae
Some algae, like chara (muskgrass), grow on the bottom and can help oxygenate the water. But even beneficial algae can become a problem if they spread too much.
Signs Your Pond Has an Algae Problem
It’s easy to miss the early signs of algae—until it’s too late. Here’s what to look for:
Visual Clues
- Murky or green-tinted water
- Floating mats of green, brown, or blue scum
- Slippery rocks, walls, or waterfalls
- Decomposing algae buildup near the edges
Smell and Behavior
- Musty or foul odors from the pond
- Fish gasping at the surface, especially at night
- Reduced visibility or struggling plants
If your pond looks or smells “off,” chances are it’s out of balance. Catching these signs early helps prevent major damage.
How We Help You Keep It Under Control
At Just Add Water, we focus on long-term algae control—not quick fixes. Our maintenance plans are built around prevention, using proven methods that keep your pond clear and healthy.
1. Routine Pond Cleaning
Leaves, muck, and other organic material feed algae. We remove debris from the pond floor, skim the surface, clean filters, and vacuum sludge. Clean ponds are less likely to see algae take over.
2. Water Testing and Balance
We regularly check pH, ammonia, nitrates, nitrites, and phosphate levels. If something’s off, we catch it early and make the right adjustments. Balanced water means algae won’t get the upper hand.
3. Filtration and Aeration
We inspect and maintain your filtration system to ensure it’s working properly. We also add aerators or pumps if needed—circulating water prevents stagnation and helps oxygen reach all parts of the pond, making it harder for algae to thrive.
4. Beneficial Bacteria
We use natural bacterial treatments to outcompete algae for nutrients. These treatments are safe for fish, pets, and plants and are a core part of our maintenance strategy.
5. Aquatic Plants for Shade and Competition
Floating and submerged plants provide shade and absorb excess nutrients. We help you add or rearrange plants to maximize their impact on algae control.
6. Safe Use of Algaecides (If Needed)
When algae is out of control, we may use targeted treatments. We choose products that are safe for your ecosystem and only apply them under the right conditions. You’ll always know what we’re using and why.
Why Ongoing Maintenance Matters
You can’t control algae with a one-time fix. It’s an ongoing process—especially if your pond is exposed to sun, fish waste, or runoff. Skipping maintenance for even a few weeks during the warmer months can lead to full-blown blooms.
With a maintenance plan from Just Add Water, you get:
- Regular visits from pond experts
- Water testing and adjustments
- Safe, natural algae prevention strategies
- Cleaner, healthier water all season long
We do the work. You enjoy your pond.
Want Help With Your Pond?
If algae is stressing you out—or if you just want a clear, low-maintenance pond—you don’t have to deal with it alone. Whether your pond is small and decorative or a large koi setup, we can tailor a plan that fits your needs.
We serve Des Moines and surrounding areas.
Book a seasonal checkup or sign up for a monthly plan.
Reach out now for a quote or on-site consultation.
Contact Just Add Water – Let’s bring your pond back to life.
FAQ
What causes algae in ponds?
Algae grows when there’s too much sunlight, warm temperatures, and high nutrient levels—especially nitrogen and phosphorus. These nutrients often come from fish waste, runoff, or decaying plant matter.
Can I control algae without using harsh chemicals?
Yes. We use beneficial bacteria, aquatic plants, and filtration upgrades to manage algae naturally. Chemicals are used only when necessary—and only the safe, pond-friendly kind.
What are early signs of an algae problem?
Cloudy water, green tint, surface mats, and foul smells are all red flags. Fish acting sluggish or coming up for air can also be a sign that oxygen levels are dropping due to algae.
How often should I clean my pond?
We recommend a deep cleaning at least once a season, plus monthly maintenance during spring, summer, and fall. More frequent cleanings may be needed if your pond has a high fish load or lots of sun exposure.