Numder one most important thing in a reef ? Saltwater made with reverse osmosis deionized water there is no other way city water has chlorine or worse chloramine if you know what was in your water you would cringe at the thought of drinking it . Well water farmlands use nitrates to fertilize there field's guess where it goes. Yep in the ground. So start your reef with well water and you will see green hair algea faster than anyone else. Get a good filter for your water rodi system at lest a 4 stage . Now you need a TDS meter Total Dissolved Solids. Your DI filter will not last forever so check your water with this meter once and awhile
If it is not 0 time to change DI filter. Now you have the yor water from your tap good . Pick a salt any salt mix and stay with it do not change your brand or type. They are not the same and you want stability. Change 7 to 10 percent water a week. Now you have a good start for a reef tank.
If it is not 0 time to change DI filter. Now you have the yor water from your tap good . Pick a salt any salt mix and stay with it do not change your brand or type. They are not the same and you want stability. Change 7 to 10 percent water a week. Now you have a good start for a reef tank.