A lot of the common problem with the blue rams is pH differences. It's almost impossible to find out what they're raised in these days when dealing with a LFS. If they're raised with a higher pH, the lower pH that wild speices need will kill the captive bred, and vice versa... if dealing with something coming from a lower pH and they're introduced into higher pH, they don't stand much of a chance. Our store found this out when we had a few shipments come in and go down for no reason at all. Finally I suggested splitting them, some into soft water and some into standard tap water tanks. What we found out is that they survived in the standard tap water tanks and died in the soft water... that shipment. The boss called the wholesaler who told him that some are raised in tap, some in softer. From that point on, every shimpment had to be split because we never knew what they were sending us.
I want to add, the way I discovered this was that early on, when we were losing them within 48 hrs, I took a few home before they ever hit the store tanks... right from the wholesaler to my tank... mine went into standard tap water, and survived.... all of the fish at the store were put into soft water, and all died by the next night. Mine lived almost 10 yrs, and were bright and colorful from the start. (My ex put a fish into the tank and it ate them while I was at work one night) Those were some of my favorite fish. I still have one, he shares his tank with goldfish, of all things. He was missed when I moved the other fish, and I didn't see him until almost a month later, but he's been thriving in there, with 2 large fancy goldfish for almost a year now. The goldfish will be going to their new home soon, so he'll get his tank back. All I use in that tank is standard tap water with a pH of about 7.8
I won't suggest others keep rams with goldfish, most rams are way to aggressive for that... and they prefer heated water. What I am suggesting is finding out what pH they are thriving in BEFORE buying them, and make sure your tank can allow for that.