Broodstock and larval nutrition in successful aquaculture

Dear sir/ madam
What's your idea if we use the sand worm ( red California worm) In maturation diet how's the profile of this worm if we replaced whit blood worm because this worm is more cheap than blood worm 
Best regard
M.gorgij

I am seeking a vitamin supplement for cold water marine fish that is encapsulated or otherwise bound in a pellet (e.g. wheat middlings). The intent is to insert the vitamins into raw fish for feeding to recently caught wild broodstock. Does anyone know of a source for such a supplement, or a company that can make a supplement to my specifications - without requiring an excessively large order?

We used to break up children's chew-able vitamins and put the pieces inside the raw fish. Low tech approach but effective. You can even get them with extra DHA now.

The problem with this is an imbalance of key Vitamins. Overdose of some, underdose of others.

You could try Invie breed-M. I have used that and mixed with gelatin to improve water stability. It is intended to be used as a fully balanced semi-moist diet. So it is not going to be like a vitamin/mineral pre-mix, but could probably be inserted into raw fish and give them a boost that is formulated for broodstock. If you can get the fish onto the semi-moist diet, that product is well formulated.

Thanks Chris. We've talked about Breed M and there's a trial underway now to see how some marine fish perform reproductively so we are looking forward to those results.
We currently insert a dry broodstock feed formulated for salmonids into the wet fish.
We previously had tried converting our brood to a commercially produced broodstock feed that we made into a moist pellet and the results were near disastrous: poor acceptability, poor body condition, poor spawning results. We are therefore a little cautious now about this prospect.