How To Clean Algae From Your Koi Pond Using 3 Best Methods

This Is How JVI’s Owner Cleans His Pond And Recommends To Clients Around Nashville, Tennessee

Thank you for learning how to take care of your pond! Ponds can quickly turn into an eyesore when algae start taking over.

In this post, you can find 3 ways to help control algae in ponds. You can also discover a few ways to help with algae control.

Can You Even See The Bottom?

“Is that the bottom? Or just an algae clump?” asks Amanda.

James sighs. “I have no idea. The only thing I know is that our pond looks gross and needs help. We need to find out how to treat algae in a pond. Then we need to know how to control algae in a pond.”

“As long as we get our clear, beautiful pond back!” says Amanda firmly. “And make sure it stays that way,” finishes James.

Amanda takes her phone off the charger. “I’ll bet we can find answers on our pond contractor’s blog. It’s where we found out about spring pond maintenance.” She starts searching through the contractor’s website.

“Here we go!” Amanda shows James her phone. “They do have a blog post about algae control. Come check it out with me.” James walks over so he can read the post too.

Here’s what the couple discovers:

How To Kill And Control Algae In Koi Ponds

Some great products to put in ponds to kill algae are beneficial bacteria, pond flocculant, and extra aeration. To prevent algae you can use aquatic plants, aeration, regular cleaning, and regular maintenance.

As a short-term solution before adding beneficial bacteria, we recommend Aquascape Quick Fix Pond Gummy (which we offer at our store). It’ll clear your pond more quickly while the beneficial bacteria help keep it that way.

1. Beneficial Bacteria

Beneficial bacteria work from the surface to the gravel bed removing nitrates, phosphorous, and more. There are different strains so you need to find the right one for your pond.

We use and recommend starting with Aquascape Wetland Pond Lake Bacteria. It should work in about 2 weeks if you use double the recommended dose every day.

If that strain doesn’t work, Aquascape Professional Grade Beneficial Bacteria might. Your pond should be clear after about 4 to 5 days of use.

If this doesn’t work, the final strain to try is the normal Aquascape Beneficial Bacteria (which we offer in our store). You should see results quickly after all the strain you’ve tried.

2. Flocculant And Fine Mesh Mat

Flocculant is a substance (safe for water and wildlife) that causes particles to clump together. In this case, the particles are algae and suspended debris.

It bonds the algae and other debris together and sinks to the bottom. This makes it easier to clean or filter out. You can combine it with a fine mesh under your waterfall to catch the debris.

We use and recommend Aquascape Rapid Clear Flocculant.

3. Extra Aeration

Waterfall aerating a pond

Aeration is using something to add more oxygen to your water. This is done by exciting the surface of the water like through waterfalls or aerators that make bubbles.

Increased oxygen levels help beneficial bacteria thrive. It also helps decomposition happen more quickly. This means the bacteria can work better and faster.

4. Combine These 3 Ways To Clean Fish Pond Algae

Clean and clear pond

If you combine all of these together you should start seeing clearer water in a few days. You don’t want to go overboard though. There’s only so much you can do or put in before it stops helping.

How To Control Algae In Ponds

Pond with lots of plants

Aquatic plants. One of the benefits of aquatic plants is algae control. They take up the nutrients algae eat, provide shade, and clean the water. Algae need nutrients, sunlight, and unhealthy water to thrive.

Careful fish feeding. Feeding your fish too much too often can lead to algae blooms. Leftover food breaks down and dirties the water. Feeding too often makes your fish use the bathroom more. This makes the water even better for algae blooms.

Regular cleaning and maintenance. Cleaning and maintaining your pond will help keep algae levels down. Clean ponds are healthy ponds that don’t support algae growth. Maintained ponds continue to work well so they can keep themselves clean.

Aeration. Aeration helps prevent stagnate water, moves the water, lowers the temperature of the water, and makes the water healthier overall. It disrupts what algae need to grow.

You May Also Like To Know

“Alright let’s get these things and start clearing our pond up,” says James as he grabs his car keys. Amanda nods. “And while you drive I’ll see what other koi pond maintenance posts this blog has.”