Laguna Koi Ponds

(949) 494-5107


Library Ozone

Laguna Koi Ponds
20452 Laguna Canyon Rd.
Laguna Beach, CA. 92651 U.S.A.
Hours of Operation:
Monday-Friday 9AM-5PM Satuday 10AM-5PM
Sunday 11AM-4PM
(949) 494-5107
Pond Calculator App for Android


What is ozone?

Ozone is an oxygen (O2) molecule in an electrically charged state known as O3. The highly reactive O3 gas oxidizes organic waste products in the pond. The waste products are basically decomposed. The ozone gas is used up in the process and is non reactive. The ozone breaks down into an oxygen molecule again.

What will ozone do for my pond?

Ozone can be used in ponds to help control algae and water clarity. Ozone oxidizes the algae spores. Additionally, some of the algaes nutrients are decomposed which helps inhibit algae growth. Evidence suggests that ozone can help reduce filamentous stringy algae on the pond walls. Furthermore, older ponds gradually accumulate dissolved organic carbons (DOC) which turn the pond water a yellow color and actually inhibit fish growth. Ozone burns these DOC�s and imparts a crystal clear and healthy look to the pond. These effects are a bonus over standard pond ultra-violet sterilizers.

Does ozone have any harmful side effects?

An overdose of ozone can burn your fish�s gills. Ozone will gradually reduce dissolved organic waste over time. However, as the pond water becomes cleaner, less organics are available for reaction and residual ozone can begin to accumulate. A clean pond only requires small doses of ozone to maintain clean conditions. A dirty pond will consume ozone very quickly and no harmful residual ozone is detected. Correct application of ozone is necessary for safe operation.

How can I use ozone on my pond safely?

The correct size ozone unit must be selected for your pond volume. A small unit will not give you the desired results and too large a unit can prove fatal to your fish. Correct installation of the ozone generator can have the greatest impact on efficiency. Ozone gas is usually injected into the return pipe lines to the pond. Here the gas mixes with pond water and begins to oxidize organics within the return water. The return line is actually a contact chamber. Maximum oxidation of organics is achieved with the longest contact time within the return pipe. The longer the contact time within the pipe, the less residual ozone will return to the pond. Any residual ozone reaching the end of the pipe will be vented off to the atmosphere if the water is splashed over a good waterfall. Under ideal conditions very little residual ozone will return to the pond. The best installation will have a long stretch of return pipe and a large waterfall. More elaborate contact chamber designs can be incorporated onto your system; please feel free to contact us for further information.

Notes: Do not install an ozone injector before a biofilter as the ozone can oxidize your good bacteria. Do not install ozone on ponds smaller than 1000 gals. High humidity reduces O3 output. Install the ozone unit in a dry location.