Thanks.. 2x 155w ocean revive Chinese leds, no dosing, monthly 30% waterchange, gfo and carbon reactors all the time. Old euro reef 5-2 skimmer, tunze auto top off system. And that's it.... I rarely test my parameters, maybe every 3 months, I mostly keep my hands out of the tank and fully believe in a minimalistic approach to reef keeping. Years ago, late 90's when I had my first tank I had much success and this was long before all the new gadgets and chemicals were available for our tanks..