A fellow reefer asked me if I would explain my treatment for pinched mantle with Prazi Pro in detail and I figure it's better to post it here for everyone to see:
Upon receiving a clam near the 1st of June (small 1.5 inch croacea) I discovered what I observed to be pinched mantle. This was confirmed when the tank he was sold from had a gigas die from pinched mantle. The clam did not look like it was doing terribly but in order to head the problem off at the pass if you will, I began researching methods of treatment. FW dips will help the clam out for several days but the infection usually returns within a week. I know I took a huge risk (my tank has extreme flow and is all SPS and that small croacea along with a large 6 inch one. The 6 inch clam showed no signs of infection but I wanted to rid the water column of the infection as well. I read somewhere (I honestly can't remember where but I imagine it was on clamsdirect's forum) that people had sucess with prazipro. I read the label of the bottle and it claimed to kill fluke (the infection is a type of protozoan) and was totally reef safe. I have a 30 gallon aquarium with a 10 gallon sump for reference but used whatever the recommended dose was, I believe 1 tablespoon. I turned my skimmer off for 6 hours then adjusted it down when I took it back online (Euroreef CS6-1). Within the next day, the clam was the most expanded it had been and within two days was out like a normal happy clam should be. I experienced no side effects save the skimmer going a little crazy and it's now been 3 weeks with no sign of the infection returning. Oh, also I added the dosage only once and to the overflow to give it a maximum mixing time before going into the tank. Hope this helps and let me know if I can do anything else for you!
*I'd also like to include a list of the corals and critters that were unaffected by the medication (it supposedly kills flatworms as well )
-Various fish including a Potter's Angel, chalk basslet, and yellow assessor
-Shrimp including cleaner and peppermint
-Various hermits and an emerald crab
-Snails (Astrea, Turbo, Cerith)
-Acropora species including torts, stags, and a small tabling frag
-Montiporas
-Blastos
-Zooanthids and Palythoas of various colors
John