Well I would recommend not doing the corals. The coral will not make it through the panacur treatment and anything in the tank that has been panacured will leach out and kill the corals even if you don't panacur them.

You can possibly do some macros. Chaeto will survive the panacur treatment and some of the grape caulerpas have made it in the past but don't look too great when done. Of course they grow back. What's important is that they survive it.

The tigger pods are super nutritious, but the problem is that they crawl rather than free swim. The seahorses will have to hunt for them. Often Seahorses will be lazy and just sit there waiting for their food to swim by...

They also are very slow to reproduce. You would have to have a very large culture going in order to have enough to feed the seahorses. The other problem is the tigger pods have been know to crawl on the seahorses which can irritate them. This really doesn't cause a lot of problems other than the seahorses constantly twitching to try to get them off of them. I think tigger pods are a great thing to have on hand to supplement their diet or in case you get a bad hatch of brine shrimp one day, I just wouldn't rely on it for their sole food source.

As far as where to get them, you will need to decide whether to go captive bred or wild caught. This is really less of an issue when it comes to dwarfs than it is with the larger seahorses. If you want to go CB, I recommend Seahorse Source. If you want to go WC, I recommend Dana. He is a collector in Florida. He sells them on Ebay and also has his own site where he lists what are available that have recently been caught. I can't think of the exact address now. It might be something like Florida Collector? I'll have to look around...