I have never wasted my time or money on any of those products. 100% natural or just add some borax from the grocery store. Then just split into "day use" bags. The good ziplock freezer ones. Roll them up like you would roll whatever...bobs your uncle
Going natural is probably really good, however, I always find them hard to tie up, and they milk out way faster, like 1 or 2 drifts.
I once did a comparison study to see the effectiveness of different cured roe types and the results:
- fresh roe in roe bags (milked out in 1-2 casts, milk was clear in colour, hard to tie in roe bags)
- fire brine (red) in roe bags (milked out in 6-8 casts, milk was cloudy in colour, easy to handle)
- bor X fire (orange) in roe bags (milked out in 3-6 casts, milk was clear in colour, little soft and harder to handle than fire brine)
- fire brine (red) /bor x fire(orange) mixed in roe bag (milked out in 6-8 casts, milk was cloudy and white, easy to handle but very sticky, milked out tons of juices)
- fire brine (red) skien (milked out in 6-12 casts, milk was similar to roe bags but milked out much slower)
- fire brine (clear) /bor x fire (orange) skien (milked out in 6-12 casts, milk was similar to roe bags but milked out much slower)
- fishheads rainbow roe in roe bags (lasted the longest, maybe 6-12+ casts, not as much visible milking of any juices though)
These were all tested in one fishing session at Glen Haffy stocked rainbow trout ponds (results will vary for lake O steelhead). As far as fish production, I found they were most aggressive towards the roe that had a combination of fire brine and bor X fire. I'm guessing it was because of the excessive and white/cloudy milking. Second to that was fishheads roe. Even though it didn't seem to have any visible milking, it was more durable and a few times after catching a fish, I was able to salvage the roe bag to catch another.
After that experiment I went to a west trib for trout opener this year and absolutely killed it with the fire brine/bor X fire cure while all the fishermen I saw that day left without a single take (8+ fishermen). I had never fished on that trib before, and had a great morning, with the first fish on the first drift!