Hello guys I have another question. My tank has been running about 10months now. I have been testing for the basic things such as amonia, nitrite, nitrate, calc, alk, sg etc. I do 25% water changes weekly and I have not had any problems. I do add strotium to my top off water and I also have a phosban reactor hooked up to my system. I do not have an iodne test kit nor a magnesium kit. Just wanted to know if I really need to test for these things and what must I test for to improve and maintain my corals and growth. Thanks. FYI my water parameters are fine...