Hard to say. If these are just frags, then no, but if they are pretty large pieces, then I would look into a 2 part dosing regimen. B-ionic or something like that should be fine for that small tank. If that starts getting expensive, then you can look to bulk reef supply for larger amounts.
Remember, you can't add calcium without effecting alkalinity, and magnesium also needs to be in line with the other two.
And the most important thing I can tell you- Don't add blindly. Test and test again and make sure you are adding just what you are using. I would rather not add anything and accept slower growth than majorly screw up parameters.