Yea I had been using RC for about 18 years never had a problem keeping any coral and about 6 years ago I started to have issues with yumas and a few other corals. I got a bad bag of RC that killed about $1000 worth of livestock and was told from a LFS that was trying toget Aquarium Systems to do something about it by either replacing my livestock(which didn't happen) or give me free salt of my choice. Well I sent the rest of the bag to them for testing and they said there was nothing wrong with it(of course). The bag I had was giving me test of Alk that was off the highend of the test and PH of 13-14...I was also told that they had made adjustments to the formula about the sametime....I quit using it and went to oceanic and got the dreaded brown slime algae.....The the rep for AS sent me 2 boxes of RC. So I used them and had no issues but all of my yumas that I had that lived melted. About 4 years ago or so I switched to Red Sea Pro and have no issues keeping Yumas or any other corals....I still have some yumas melt once in awhile after shipping like they tend to do but I can and do have some yumas that are thriving like they never have before RSP.......Luckily the LFS that I deal with RSP is the only thing they use as well...Even my Floridas look better over the last 4 years then I had them look in the years past....
Not sure if it is something missing with RC or what, I could never pinpoint it with testing but do know with me RC couldn't keep yumas alive for nothing....
Not sure if it is something missing with RC or what, I could never pinpoint it with testing but do know with me RC couldn't keep yumas alive for nothing....