Evolution Aqua

Most ponds run into the same few water quality problems, and Evolution Aqua builds equipment aimed at each one.

• Green water from blooms of single-celled algae
• Ammonia and nitrite that rise with a heavy fish load
• Cloudy water carrying fine organic solids
• Maintenance fatigue from washing foam pads and sponges by hand
• Tap water toxins such as chlorine and chloramine during fills and water changes

A filter handles waste and biology, a UV clarifier handles green water, and a pre-filter or polisher catches what gets past both. Most well-kept koi ponds use some combination of these.

Filters in this range do one of three jobs: remove solids, break down fish waste, or both at once. Which one you start with depends on the problem you are solving.

Combined mechanical and biological filters

The EazyPod, EazyPod Automatic and Nexus+ remove solids and handle the nitrogen cycle in one unit. The standard EazyPod is rated for ponds up to 2,640 gallons, while the Nexus+ is built for koi ponds with heavier fish loads.

Choose one of these when fish health and biological filtration are the main job.

Choose the automatic version when you want cleaning run on a timer instead of by hand. The Nexus Automatic System is a separate upgrade that automates cleaning on an existing Nexus filter, factory set to a three-day cycle that you can change for heavier loads.

Pressurized media filters

K+ Advanced filters are sealed pressure units using floating K+Media pre-loaded with minerals to help beneficial bacteria establish. Internal pipework is arranged to make good use of pump flow.

Choose a pressure filter when you want a sealed unit that can sit away from the pond edge and be cleaned with less handling of media.

Pre-filter sieves

The Cetus Sieve screens coarse debris before water reaches your pump or main filter, in both gravity-fed and pump-fed systems. It sits alongside filters such as the Nexus, EazyPod and K+ Advanced.

Choose a sieve when heavy debris is the issue and you want to protect the biological stage behind it. It does not replace a filter.

Water polishers

The Tempest is a secondary polisher that runs alongside your main filter, not instead of one. It uses air-syphon cleaning and K+Media to capture fine particles down to 1 micron.

Choose a polisher when your filter keeps up biologically but the water still carries a light haze of fine solids.

All-in-one external filters

The Surge combines filtration with an integrated 18-watt UVC and Air Clean Technology, so trapped waste is cleared without scrubbing pads.

Choose the Surge when you want one external unit that covers clarity and green water together.

Some jobs sit outside the filter itself: clearing green water, moving water, and treating tap water before it reaches fish.

UV clarifiers

The evoUV uses high-output T8 bulbs to help control green water and works with Nexus, EazyPod, K+ and standard pond systems, with six sizes to pick from. The EvoUVTI Titanium adds a photocatalytic titanium stage and is rated to clear algae up to 1.5 times faster than standard UV units.

Choose the evoUV when green water is the only issue and you want a straightforward inline unit. Choose the EvoUVTI when you want the faster clearing the titanium stage provides.

If the problem is low oxygen rather than green water, aeration equipment is the better starting point.

Pump, bottom drain and source water

The Varipump runs submersed in the pond or mounted externally, with adjustable flow and a real-time wattage display. The 4-inch Aerating Bottom Drain is molded from heavy-duty Schedule 80 PVC with a 4-inch inlet and a 1-inch side-mounted aeration pipe. The Detox Dechlorinator uses activated carbon to treat tap water on the way into the pond and connects to a garden hose or rigid pipe.

Choose these when you are building or upgrading the plumbing around a filter, or filling and topping off with municipal water.