Test kit

I have a 28 gallon saltwater bow tank and I am looking for suggestions on a test kit and which individual kits I would need. My old API kit is outdated and now that I have finally got my system under control I would like to keep it that way so down the road I can add soft coral. My old kit tested nitrate, nitrite, ammonia and PH. What else would you suggest?

Thanks.

 

Calcium, Phosphate, Alk/dkh, Magnessium at least. You can also add Strontium and Iodine test kits as well. The general rule is never add anything in to your tank that you don't test for.

 

API Reefmaster is ok if want to go less exspensive,gives you Ca,DKH,PO4 and NO3.Salifert kits are better but much more $.