Grotech ABC are elements that corals need, so in general they should be helpful for Lps, softies and sps. Why people always only talk about sps is because for sps, colour lost is very common and people are looking for ways to improve the colour or maintain it. For Lps I think most important is the gene, if the Lps is not nice in the first place, it is not going to be nice after a period of time, this is from my limited experience with Lps. Hence it is important to buy the luminous and nicest Lps instead of just buy a normal one and hope that it will become a gem.