Johnny, it was RO about a year ago, I stopped doing water changes to try and get them to stop breeding, no luck. Plan on getting the Emp's and Platies out, someone is giving me a trade for them. Gonna see if they give me a good deal for the adult discus too. Then claen up and replat the tank for the 9 little ones. I've thrown them in local water, no problem, discus are tuff as nails once you get them adjusted and feeding. Had the 2 females in one of my ponds last year, no sweat.
Tanque Verde, thats a nice clam, is that one he's selling? Haven't dealt with him in years. He used to just sell plants, FW clams, snails a few fish and shrimp no salt water. He never let you see his place, met you at the 7/11 o K by Cortaro aroud 4:00PM so you didn't have to pay shipping. Back then it was him or nothing, sometimes OK sometimes some stinking stuff. Funny, he claimed he grew it and fresh packed the night before because of volume. Open some packages and they were rotten.
Maybe he cleaned up his act and got into SW stuff, but I'll go to A LFS I trust for Clams, too many things that kill the clam you bought and also the ones you already have. Especialy the little rice sized snails and some virus's