Some years ago we make different tests with probiotics in german forum "ZML". We used different goods. But all these products were bound to unsuitable carriers, such as maize. We wanted to smuggle in the bacteria into our fish over living BBS.
There were some successes but not one of tested products was produced directly for rotifers or bbs enrichment and marine aquaculture. The idea of improving cultivation/breeding probiotically never let me off, however.
Some time ago I found a new product. It is directly produced for marine aquaculture. Yesterday the probiotics arrived.
It is for rotifers & bbs culture / enrichment and directly for shrimp fry. The good is very thrifty. 1 kilo reaches for enrichment at 140 litres plankton for 2 years. The product can be deep-freezed so long. But actually it does not have any withdrawel times.
You have to incubate 10 g in 1 litre steril saltwater for 6 to 12 hours at 33 °C. Of this solution You need 50 ml for 50 litres plankton or shrimp grow out tanks a day. The specific strains regulates microbiol ecosystem of culture water, reduce in undesirable micro-organisms and it produce lactic acid to enhance immune system of our fishes and shrimps. 2 of the bacteria specism are working against vibrio, too (if my enquiries over Google are correct

I will start to use the bacteria with Hippocampus (zosterae, reidi, barbouri, angustus) and with bbs + copepods. I will make a controll group without probiotics. Sylvio from ZML will test it with me, too.