very very low flow, low to medium light, water nutrient not very particular. they do well in average, slightly poor to excellent conditions. are very hardy LPS. make sure you do not damage it. not even abit. once skeleton is exposed, very likely the coral will start to melt away.
have kept blastos alive for more than a year with no problem. provided you satisfy the low flow part. its very important for them. but yeah i have experienced them melting away for no reason before.