Copepod Sieve 50 Micron: Live Copepod Feeding Tool
You have live copepods on the way. The culture is healthy, the timing is right, and you know how much difference a good addition makes to your mandarin or your refugium. The part most keepers don't plan for is what happens between opening the bottle and those animals actually reaching your fish.
Poured directly into a sump or display tank, live copepods scatter. Some reach the refugium and establish. Many are drawn into skimmers or swept through overflows before any fish can respond. Without a way to concentrate and direct them, even a strong live culture produces inconsistent feeding results, and for a mandarin that depends on live prey every day, inconsistency has a cost.
The Reefphyto Copepod Sieve is a 50-micron fine mesh net that puts you in control of exactly where your copepods go. Pour your Tigriopus californicus culture through, drain the carrier water, and introduce a concentrated dose of active animals directly to your chosen feeding zone. The same mesh handles frozen food rinsing cleanly, removing the phosphate-rich pack liquid from mysis or brine shrimp before it enters your system.
With a sieve in hand, feeding live copepods becomes deliberate rather than approximate. You see the animals in the net, active and dense, and you release them precisely where they need to be. The feeding response is faster, more visible, and more reliable, which matters most on the days your mandarin needs to see prey moving in its territory.
Reefphyto has been culturing and dispatching Tigriopus californicus from our Welsh facility since 2008. This is the same sieve Darren uses at production scale to handle, grade, and portion live cultures. If you have questions about your copepod feeding setup, Darren responds personally.
Copepod Sieve 50 Micron: Precision Live Copepod Delivery for Reef Keepers
Buying a good live copepod culture is only half the work. The other half is getting those animals from the bag to the right place in your reef system without losing the majority of them to the skimmer, the overflow, or the unpredictability of a high-flow sump. The Reefphyto Copepod Sieve is a 50-micron fine mesh net designed to make that delivery precise, controlled, and genuinely effective.
The Problem with Pouring Live Copepods Directly into the Tank
Most reef keepers who try live copepods for the first time pour them straight from the bottle. It works to a degree. Some animals reach the refugium and begin to establish. Some are hunted near the entry point. A meaningful proportion are swept into skimmers or overflows within minutes, before any fish can respond. The result is unpredictable: some feedings produce a visible hunting response, others seem to vanish without effect.
The variable is rarely the quality of the copepods. It is the method of delivery. Without concentration and direction, you are releasing animals into a complex, high-flow environment and hoping they end up where they are needed. For a mandarin dragonet that needs to hunt successfully every single day, hoping is not a strategy.
How the 50-Micron Mesh Works
The 50-micron mesh retains adult Tigriopus californicus copepods and late-stage nauplii while allowing water to pass freely. Pour your live culture through, let the carrier water drain away, and you are left with a concentrated mass of active animals ready to be introduced precisely where you need them.
At 50 microns, the mesh also retains frozen food particles cleanly during rinsing. Mysis shrimp, brine shrimp, and krill cubes thawed and rinsed through the sieve shed the phosphate-rich pack liquid before the food reaches your tank. It is a small step with a meaningful cumulative effect on water quality over time.
How to Use the Copepod Sieve
Delivering Live Copepods
Pour your live copepod culture slowly into the sieve held over a clean container. Allow the water to drain through the mesh completely. Submerge the sieve at your chosen introduction point, near the refugium inlet, close to the substrate your mandarin patrols, at a low-flow area where prey will remain visible, and gently agitate to release the animals directly into that zone.
This approach reduces wastage to skimmers and overflows significantly compared to direct pouring, and allows you to target feeding to the specific fish or zone you are supporting. A mandarin dragonet that consistently finds prey in the same area of rockwork is one that is feeding reliably. That consistency is the difference between a fish that actively hunts and one that slowly declines.
Harvesting from a Home Culture
Reef keepers maintaining a home Tigriopus californicus culture with the Reefphyto Copepod Culture Kit will find the sieve invaluable at harvest time. Rather than introducing culture vessel water directly into the display, the sieve lets you concentrate your harvest, drain the culture water, and deliver a dense dose of animals cleanly. It also makes it straightforward to assess population density and animal condition before each harvest. You can see exactly what you are working with.
Rinsing Frozen Foods
Place a portion of frozen food in the sieve and hold under cold running water until fully thawed. The pack liquid drains away while the food is retained. This takes under a minute and removes a meaningful volume of dissolved phosphates from every frozen feeding. Over weeks and months, this habit contributes to more stable water parameters and reduced algae pressure.
Sieve Specifications
The Reefphyto Copepod Sieve measures 100mm high and 49mm wide with a 50-micron woven mesh base. The dimensions allow comfortable one-handed use during feeding, compact enough to position precisely over a sump opening or refugium inlet, with enough volume to hold a meaningful concentrated dose of live animals. The mesh handles both saltwater and freshwater rinsing and is designed for repeated use.
Who the Copepod Sieve Is For
Mandarin Dragonet Keepers
Mandarin dragonets are obligate live feeders that hunt copepods continuously. Targeted sieve delivery at the specific rockwork or substrate zone your mandarin patrols produces a faster and more reliable feeding response than general introduction. It also means more of each culture reaches the fish that depends on it most, rather than disappearing into the skimmer.
Pipefish and Seahorse Keepers
Pipefish and seahorses are ambush hunters that depend on prey drifting into range rather than pursuing it actively. Concentrating live copepods and releasing them slowly in the immediate vicinity of these animals gives them a realistic opportunity to intercept food. Scattered introduction in a high-flow system means prey often moves past too quickly for these slow-moving fish to respond.
Refugium Keepers Establishing Copepod Populations
When seeding a new refugium, targeted introduction via the sieve gives your founding copepod population the best chance of settling before being predated or flushed out. Delivering animals directly to the refugium substrate or macro-algae bed maximises establishment success compared to releasing them into the main display.
Keepers Using Frozen Food
Reef keepers who feed frozen mysis, brine shrimp, or mixed reef foods regularly will find the sieve worthwhile as a rinse tool for every frozen feeding. The pack liquid in frozen marine foods is high in dissolved phosphates. Rinsing before every feeding is one of the simplest water quality habits available, and the sieve makes it a practical part of any routine.
Frequently Asked Questions
What does the 50-micron mesh retain and what passes through?
Adult Tigriopus californicus and most late-stage copepod nauplii are retained. Water, early-stage nauplii, and rotifers will pass through. This makes the sieve appropriate specifically for copepod delivery and harvesting rather than for retaining very fine zooplankton.
Can I use this sieve with the Reefphyto Copepod Culture Kit?
Yes. The sieve is the natural harvesting tool for a home copepod culture. It allows you to concentrate your harvest, drain the culture vessel water, and introduce a clean dose of animals directly to your tank or refugium without adding culture water to your system.
How do I clean the sieve after use?
Rinse thoroughly with fresh water after each use and allow to air dry. Avoid detergents or cleaning agents on the mesh. A brief saltwater rinse immediately before live food use helps avoid osmotic shock to the animals being handled.
Is this the same sieve as the Rotifer Sieve Net?
The physical sieve is identical, 50 microns, 100mm x 49mm. The Rotifer Sieve Net is listed separately for reef keepers who culture or feed live rotifers and need a dedicated handling tool for their rotifer feeding routine. Many keepers use one for copepods and one for rotifers to avoid cross-contamination between cultures.
Complete Your Copepod Feeding System
The Copepod Sieve works alongside the full Reefphyto copepod range. Live Copepods are the core culture product for refugium establishment and long-term population building. Pod-Shot provides a ready-to-use top-up dose when you need to feed today without preparation. The Copepod Culture Kit gives you everything needed to grow your own Tigriopus californicus at home. For reef keepers who also feed rotifers, the Rotifer Sieve Net provides the same precision handling for your rotifer feeding routine.
Cultured in Wales, shipped live.