They do take in ammonia and because fish breath it is always present. A test kit shows a very small ammount of what's actually there, so to believe that you have 0 ammonia is silly unless your tank is dry. On that note I was under the impression they were after the trates and fwiw. I have a maxima that I've have for 11 months and a crocea for about a month both doing well in a couple month old bc29. Although IMO my filtration is there, the last tank I had that the maxima was in was crap and the clam was one of few things I could keep alive. I think clams are much easier than people give them credit for. If you are confident in your skills then why not try it. I would have quit long ago if I gave up at every small problem. The thing that's helped me the most is having a calander next to my tank where I write everything tank related
and I am assuming that the clam Pumping is a normal reaction that hopefully is not damaging as I do have to feed the rest of the inverts in the tank. I'm late for work too. GTG.... I'll be on later this eve

