I’m in the same boat as you. 560 gallon tank with multiple frag tanks plumbed in. The display probably has a 1000 pounds of rock in it. I did have a refugium for the first year until the coral got established and the rock matured. I took it off-line about four or five months ago and it was the best thing I ever did. I don’t run any filter socks and no Algae filtration at all. Growing algae is a dirty business. I know my tank sure isn’t suffering because of it. I always tell people that are setting up tanks that it is the best thing they could ever do setting up a refugium with a good strong light on it but in my opinion there comes a time when one can start working against you.Spot on!
Good liverock, good flow, decent light, lots of food, sps growth and appropriate dosing are all you need. I slowly removed my skimmer, UV, mechanical, carbon, etc etc and have been completely filter free for 18 months. The coral is the filter. I recently culled 7 pounds of coral as Allelopathy seemed to become a problem
my phosphate sits between 0.05-0.08 and nitrate 0.8-1.5ppm.

. I used various lights, various "flow" patterns and bought cheato from multiple sources...but the cheato wouldn't grow, shrivle and get taken over by GHA. However, GHA grows so fast for me its almost unavoidable, so decided to go with an ATS. I would love to have a large thriving fuge with various algae's and microorganisms.


