Craig,
I am sorry I could not respond more promptly.
There are many good recipes on how to cold smoke fish (salmon, for example) on this forum. Personally, I went through and tried many of them. Particularly, I was interested in the “wet” brine vs. “dry” brine. I came to the conclusion that I prefer dry brine better then wet brine. This does not mean that one is better over another – this is just my personal preferences. Mostly, I smoke salmon. Sometimes I smoke mackerel and rarely carp. Just couple of times I smoked halibut. Halibut is way too expletive for me at $17 per pound and I can’t afford to smoke it more often.
When I smoke salmon (and we are talking about cold smoke) I use this, very simple dry brine recipe: 1 part of salt + 1 part of sugar. Depending on fish weight, I add 0.25% of cure 1. Mix all together. Thinly cover bottom of plastic, food grade container with this mixture, lay the fish on it and cover fish with the mixture completely. If there are more fish left for smoking – you can place it on top of first layer and cover it with more mixture. Cover the container with plastic wrap or whatever is appropriate for this and - in the fridge. I remember that I cured my salmon for 24 hours and this was my first try with dry cure. Usually I apply cold smoke for 5-6 hours but depending on thickness of your fish you can smoke it for days. After I finished smoking and tested the fish – it was under salted! I could not believe it… Next time I cured salmon for 40 hours in the fridge, soaked it in ice cold water in the fridge for 90 min changing water three times – to remove extra salt from the surface of the fish. When I tried it after the smoke was completed – it was a little over salted. I was disappointed but decided to vac pack my fish. I don’t like when fish starts drying out so I vac packing salmon right after smoke is completed and - in the fridge (not freezer) for two days. When I tried my salmon in two days – it was perfect. Just right amount of saltiness… This is lox like kind of salmon.
Now about halibut: this fish has more delicate texture and IMHO and needs to be wet brined for no longer than 10 hours if thickness of your fish no more then 1”. You should add some extra time if your halibut is thicker then 1”.
Brine is pretty simple: Also, please don’t forget to soak you fish in ice cold water for at least 30 min, changing water once. I already mentioned the smoking time above…
Once again, this is my way how to brine/cold smoke a fish mostly based on knowledge I got from more experienced members of this forum and some information from Mr. Google. Some people have different approach to cold smoking fish and may share their knowledge here.
Thank you.