A fishmonger’s ice bed against pads: the hybrid that works

We have used ice since my father had the shop, and it has never let us down. That is the answer you get from most fishmongers when you suggest a pad, and it is a fair answer. An ice bed does three things well: it holds temperature, it keeps the fish glossy, and it costs almost nothing per day. What it does not do is deal with its own meltwater, and that is the gap a pad fills.

The argument is not ice or pads. It is where the water goes.

What an ice bed does well and what it cannot do

A properly built bed is a drainage system as much as a cooling system. Crushed ice, a perforated tray, a slope, and a sump underneath. When it is built well, meltwater leaves the fish alone and the display looks superb. When it is built badly, or when the drain blocks at 3 pm on a Saturday, the fish sits in cold water and the texture goes soft within hours.

That is the failure everybody has seen: not warm fish, but fish poached in its own melt. A pad under the ice layer gives you a second line of defence for the day the drain blocks, and a way to keep the bottom of the display dry without rebuilding the counter.

The layer order that works

Bottom to top: perforated tray, absorbent sheet, thin ice layer, fish, top ice. The sheet sits under the ice, not under the fish. That is the detail people get wrong.

Put the pad directly under the fish and it does two bad things. It wicks the surface moisture off the skin, which dulls the gloss the customer is looking for, and it saturates at the contact point within an hour. Put it under the ice and it catches melt as the ice collapses, spreading the load across the whole sheet instead of one spot.

The thickness of the ice layer matters as much as the order. Two centimetres of flake under the fish gives the melt a slow path to the pad and keeps the contact area wet evenly. Ten centimetres, which is what most beds are built with, delivers a much heavier trickle when it collapses after the lunchtime rush.

The thin ice layer between pad and fish also stops the pad freezing to the product, which happens more often than you would think in a bed built on a cold plate.

Salt water and the end of the day

Melt from a salted ice bed is not clean water. It carries salt and protein, and a pad that has been sitting in it will smell by closing time even though it looks intact. Two habits keep this manageable: change the sheet at the midday rebuild rather than at close, and rinse the perforated tray before the new sheet goes in.

On a hot Saturday we have seen a bed go through three sheets between 8 am and 4 pm. That is not waste, it is the cost of a display that stays dry, and it is still cheaper than the markdowns on fish that sat in water. Count the sheets for a week and you will find the number is stable enough to forecast.

Ice quality changes the maths. Flake ice melts faster than crushed block and delivers a steadier trickle, which a pad handles well. Large cubed ice dumps its melt in bursts when the bed is rebuilt, and a single burst can fill a sheet to its margin in twenty minutes. If you buy ice in, ask which type you are getting; the pad size should follow the ice, not the other way round.

If your counter runs a sloped display, put a strip of the sheet up the slope rather than flat, so melt runs onto the pad instead of under it. And if the bed is on a timer-fed ice machine, add a sheet change to the same schedule as the ice drop, so nobody has to remember it separately. Layout options for wet displays are covered in the fresh food pad guide.