hey peoples a little about my tank. its a 37 gallon with a ten gallon sump: 25lbs live sand 45lbs live rock 250w heater 295 gph koralia nano powerhead custom top that is octoproof and so is my overflow box 75 gallon eshopps gen 2 skimmer well now that you got the basics my question is? how long do I have to wait before I can get a octo? its been about 3 weeks. i got my rock from my LFS so its really matured and has lots of coraline algae on it. this is my testing results: salinity: 1.025 PH: 8.2 nitrate: 0 nitrite: 0 alkalinity: 300ppm calcium: 450ppm i also use RO water ONLY! also should I test for other stuff? I mean when do you know that your tank is mature enough for a ceph?