[al abaqueta]

Hey there, In my opinion, it is the varying degrees of requirements based on which species of acros you are dealing with. Some require soo much more light than others and there are those that require more flow. then, once you have figured that out, some are so sensitive to the parameters, i.e. nitrates, dKH, calcium,that they don't reach their full potential as far as color. there is also the unknown, how the coral thrives in your system. these are just some of the nuances of this hobby that I have dealt with regarding the different species of acroporas. Hope this helps. Al