1000gallons and small frags really dont get along .. these wew mainly wild colonies that have grown some of these are 5 years old from the old marital residence . i transferred coral june of 2011 into this tank as well as purchase new colonies . calcium and alk are dosed from all the above . I have 2 calcium reactors , lime water dosed with a liter meter for evaporation and... an mtc air driven 2 part doser dosing esv biionic 2part 3x daily . i use all 3 so i dont rely on 1 and i dont need to drive my calcium reactors so hard . i do dose a ton of stuff using mainly korallen zucht products . i use phols x, coral snow, coral vitalizer, bbalance ,k balance ,elos trace elememts , potasium iodine,red sea amino acids a and b