Hi all I’m new here , I’m polo I have a innovative marine 25 lagoon with wrgb light (not sure if it’s a good light for corals ) this is my first saltwater tank , this is my aquascape I have a few open caves the fish can swim thru( can’t really see it in the pics ) using the dc pump that came with the tank ,will be using ocean direct sand from Caribsea , don’t know if I’m use salt or get water from fish store . Well this is the start of the tank