I have a very well established soft coral 29 gallon biocube that has a pair of young ocellaris clowns and a lawnmower blenny. Plenty of live rock with crushed coral substrate. I am intrigued at the thought of adding one or two pipefish to the tank. I have done a lot of reading on the subject and find that normally these fish won't last more than a month or two unless they are getting regular feedings of live food. Are their certain types that have a better than average survival rate when in a reef tank setting where they are trained to feed on frozen foods rather than constant live food feedings?