Hi Andre
When we were trying to raise the peppermint shrimp larvae, we used decapsulated bbs, we had no problems with hydroids. I also remember reading about peppermint shrimp larvae eating hydroids from somewhere on the internet with reference to a co-culture growout of peppermints and either scarlet cleaners or blood shrimp and I think also peppermints and fish larvae. Unfortunately I cannot remember where, but likely on MOFIB although it could have been in a paper somewhere. I remember it being an advantage because of the elimination of hydroids, which had been a problem prior to the addition of the peppermint larvae. The shrimp co-cultures did not prove to be completely successful as cannibalism became a problem with the shrimp co-cultures, but not with the shrimp/fish combo if I remember right.
From reading through seahorse.org I think the main problem Timinnl had was the peppermints eating mysids too efficiently. So true they ate all of the mysis. I didn't have a problem with them in with the dwarf or the fry. But I removed them because I rather have the mysis in with the dwarf. The H. rubra (Red Lava Shrimp) or the Thor amboinensis (Sexy shrimp) are better suited in a dwarf tank. ***Remember my level of risk might not be the same as your level of risk.***
I also think the main problem he may have had with the divided tank was the seahorses going over the divider, which could be resolved with some design changes and flow control, which would be easy to set up in a two tank off one pump in a sump system. The advantage for me of the divided system is I could easily collect egg laden shrimp (for you also when needed) and put them in the separated section to allow the shrimps larvae to feed the dwarfs. My problem was that I didn't glue it correctly and I would find some of the dwarfs on the other side. But this was years ago.
I am looking for direct links to his referred Calfo seahorse system. Do you have it? I will take pic one of these days. The tank was 110liter divided lengthwise with a piece of glass. My mistake was that I had the flow going from the front into the back. There was enough (lift) to draw the dwarf over. When the power is off, both size have the same amount of water level to the divider. When the pump is on, the water level in the front rises enough to overflow into the back part. The water level in the back drop about 1/2 an inch.
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