When I started reef keeping, 1983, information was limited. I stopped the hobby, came back off and on , back again today. One thing if you look up cultured pearls, it took 20 or more years to perfect. Edison took many trials and errors till bulb worked right. At present I have 30 gallon DT, Heavy feeding, nitrates 5-10ppm, phosphates 0-.03, no water changes. Do dose 3 ml vodka in each refugium every night. Dose calcium for 8.0-8.6 ph, depending on what time of day it is. I have 3 home made sulfur denitrators, the drip rate, (which I setup using orp, nitrate test kit, water flow test is through 1/4" tubing, connected to discharge of 500 gph pump. The flow rate is 90-110 ml per minute. Comes out to approximately 2 gallons of water per hour. Must be fine because nitrates are in the range I need. See my YouTube video showing flow rate of two denitrators under Hot rodding your DT, with sulfur denitrators pt2, Reef2Reef Will post pictures soon. So how do we hot rod our DT. By using sulfur denitrators, Google for history of them. On mine I added prefilter, then 100' x 1/4" i/m tubing. The third sulfur denitrator has 200' of tubing. This assures very little oxygen when water enters SD. When done assembling SD, I have a pilot plant, fill SD with 20ml vodka let it circulate 24-48 hrs. Then put in production. By adding and removing SD, I'm able to control nitrates,let me know what you think is really happening in SD, by doing this. Pictures coming, I promise. Happy reefing.