Wet Fish Counters: Stopping Pads From Sinking on a Sloped Display Tray

Every fish display has a low corner. Trays on a wet fish counter are set at 5 to 8 degrees of slope so meltwater and drip run forward where the customer can see the product, not backward under the ice bed. That same slope is what kills a badly chosen pad: the SAP core loads at the downhill end first, the uphill two-thirds stays dry and useless, and by 11:00 the low corner is a puddle with a piece of cod sitting in it. Fixing this is mostly a question of pad specification and how the ice is laid, not of buying thicker pads.

Why the pad loads unevenly, and what to do about it

A flat pad in a sloped tray creates a thin wedge of free liquid at the low end. Once that wedge forms, capillary draw pulls water laterally through the pad faster than the gel can lock it, so the core saturates in a band about 80 to 120 mm wide. Three changes reduce it:

• Score or perforate the pad edge. Some suppliers will slit the low-edge film so liquid enters across the width rather than through one corner. Ask before you assume it is standard.
• Double the pad at the low end. A 300 × 400 mm pad overlapped by a second 100 × 400 mm strip along the front edge adds 30 to 40 percent capacity exactly where the load sits, for a fraction of the cost of upsizing the whole tray.
• Raise the product 10 mm. A perforated plastic grid or a shallow stainless rack above the pad lets liquid fall through and keeps the fish out of the wet zone.

On an 8-degree tray holding 12 kg of whole fish and 6 kg of fillets, expect 600 to 900 mL of drip and meltwater across a trading day. That is not a pad problem on its own; a 400 × 600 mm pad at 1.2 L/m² carries roughly 290 mL, so the tray needs two pads or one change at midday.

The ice bed, the glaze and the 2 °C line

Wet fish is displayed at 0 to 2 °C, ideally on a drained ice bed, and a thawing pad is not a substitute for either. Where a counter uses a pad under fillets instead of direct ice contact, the pad should sit between the product and a perforated liner, with the ice bed below the liner. Putting the pad directly on ice produces a cold, wet interface that slows absorption and makes the pad feel loaded when it is only chilled.

Glazed fish is a separate case. A 10 percent ice glaze on a 5 kg fillet block releases 500 mL as it melts, and that water arrives in the first two hours, not spread across the day. For glazed product, pre-drain the block on a rack for 20 minutes before it goes on display, then use the pad for the slower drip that follows. Skipping the pre-drain is the single most common reason fish-counter pads look like they have failed when they have simply been flooded.

Temperature checks stay on the product, not the pad: probe the thickest part of the fillet and log it at least every four hours against your local 0 to 2 °C or 0 to 4 °C requirement. A pad sitting in a tray does not demonstrate that the fish is cold.

Swap intervals on a wet counter

Fish counters run hotter than meat counters in terms of liquid load, so the interval is shorter. A practical pattern for a shop trading 08:00 to 18:00:

• 08:00 — fresh pad, product laid out, ice bed topped.
• 11:30 — first swap on the fillet bay, corner check on whole fish.
• 14:30 — second swap, plus a wipe of the tray base; this is when the low corner usually shows free liquid.
• 17:00 — final swap or a pull-forward of remaining stock to the front third of the tray.

Anything held past 18:00 should come off display rather than sit on a saturated pad overnight. Overnight, fish goes into a 0 to 2 °C chiller on a racked tray with a pad underneath if it is still draining, and the pad is changed before the next display build.

For counters that need a pad which holds its shape under a sloped tray rather than bunching at the low end, the laminated pad constructions at florpoly.com absorbent tray pads are worth specifying by grammage and core weight rather than by pack count.