Yes, a pond can function perfectly well without a pump and filter, provided it is set up correctly. The secret lies in a natural balance, where the right substrate, plants, and bacteria do all the work.

Key requirements for a pond without a pump or filter:

• 10 cm of porous Pond substrate the bottom
  This ensures strong rooting of Aquatic plants provides a large surface area for beneficial bacteria to attach to.
• Oxygen-producing plants
  Produce oxygen and absorb nutrients, preventing algae from taking hold.
• Water lilies
  Provide shade, keeping the water cool and thus clear.
• Marsh plants
  Absorb excess nutrients and thus purify the water.
• Beneficial bacteria
  Break down waste and sludge, keeping the water naturally clear.

View the step-by-step guide to building a pond without a pump

You can prevent algae by setting up your pond naturally. Place a layer of 10 cm of porous substrate. This allows plants to root firmly and provides a place for beneficial bacteria to attach themselves. Also, add plenty of oxygenating plants (loose and in baskets) in the pond: they remove nutrients, combat floating algae and thread algae, and prevent algae from returning.

To keep the water clear, add BACTA CLEAR INSTA CLEAN . These loosen bottom sludge and remove floating debris, keeping your pond clear without a pump or filter.

Learn more about controlling algae

Yes, in almost all cases, you Pond substrate . You sometimes hear—often from pond expert Ada Hofman—that substrate isn’t necessary. That’s only true for true natural ponds that already have a natural bottom, such as ponds or pools located directly in nature.

When building a garden pond that you build yourself , the situation is quite different. It always has a bottom made of pond liner or a plastic Pond tub. Without substrate, plants cannot take root properly there, and beneficial bacteria have nowhere to attach themselves. The result: plants slowly die off, bacteria disappear, and the pond becomes completely unbalanced.

With a layer of approximately 10 cm of porous Pond substrate , you give plants a solid foundation to take root and provide bacteria with the right environment to colonize. Only then can your pond maintain its natural balance and remain clear.

View Pond substrate

Pond bacteria essential for a healthy and clear pond. They break down organic waste, such as plant debris, fallen leaves, and fish waste. This waste sinks to the bottom, where it forms a layer of sludge. If left undisturbed, this sludge becomes an ideal food source for algae.

Our BACTA CLEAR consists of two specially selected bacterial strains, developed in the laboratory based on our own concept. These bacteria loosen bottom sludge and remove floating debris, keeping your pond clean and preventing algae from taking hold.

View Pond bacteria

It's not so much about one specific plant, but rather the right combination of different plant groups. Only together can they ensure a healthy, clear pond. Important factors include:

• Marsh plants: absorb nutrients and purify the water.
• Aquatic plants: contribute to filtration and natural balance.
• Water lilies: provide shade and reduce algae growth.
• Oxygenating plants: (loose and in baskets) – control floating algae and thread algae and prevent them from returning.

View the complete 6-step plan for your pond

Absolutely! Our advice always focuses on a natural pond: a pond that stays clear and healthy thanks to the right plants, substrate, and bacteria, without relying on technology or a lot of maintenance. With the right setup, you ensure that your pond maintains its own balance.

Start Your Clear Water Plan