Compare:
Direct technology advantage: not only for fish industry, but also for human consumption; more automatically. Disadvantage: just initial time investment is a little higher than brine technology.
Brine technology advantage: price is lower. Disadvantage: only for cooling purpose, can't be eaten; need more workers. Big brine tank not easy for shipment, so it needs customer build it locally with concreting.

The ice discharge time :
Direct technology: 20Mins; All blocks discharged at same time.
Brine technology: it depends on the worker's proficiency. Usually, lift one row ice bucket, melting, doffing, feed water, put into brine water tank, the whole process takes about 15 mins. After one row discharge finished, another row started. Considering workers manually operation, you can also take 20 mins for granted.
Brine refrigeration type block ice maker, the ice cans of galvanized steel is easily to be corrosive, but if you choose stainless steel ice cans, the price is more expensive. We think you could consider the direct refrigeration block ice making maker.

Our FOCUSUN New block ice machine give the Best Solution:
The Ice modue consist of aluminium ]The freon evaporate inside, freezing the ice directly
so,
1. It's direct freezeing type
2. Need fewer time, freezing 15kg block just needs 5.5 hours
3. Aluminium plate never corrode, food grade and sanitary
4. Don't need large room, hoist, noise, dirty pool, never
5. Compact system, Easy to transport ,easy to operate, easy to get enough more blocks
Below are some pictures of Brine system block ice machine and Direct System block ice machine, for your reference.
Brine system block ice maker machine:
New block ice machine, new technology block ice making machine, advanced technology direct freezing block ice maker: