I was just wondering how to determine what species of sps go where in the tank I have sps now that are doing good I have a 90 gallon tank with sump I my perameters are good I use a 6 bulb ati sunpower with 4 blue+ 1 coral+ and a puple+ the reason I am asking is that I see so many tanks that have sps on the bottom of there tanks growing good. So the question I have I guess is how to determine which need higher light or is it based on color blues at bottom greens on top reds in middle? I know its a weird question but was just wondering thanks

