nottapooltech,

You could temporarily use Trichlor pucks as your chlorine source. Trichlor also contains cyanuric acid (CYA) so this is an easy way to add CYA to your water. Be careful with the Trichlor because it also is acidic and will lower your pH. You willl need to regularly test your pH and adjust with Borax as necessary. Also, you'll need to test your CYA levels after maybe a week of use to see how much CYA has been added. Remember too much CYA (I keep mine around 50-70ppm) means you need to maintain higher chlorine levels. At CYA around 50ppm, you would need to maintain FC at 3-6ppm at all times. If you should have too much CYA, the way to lower it is to remove some of the water and add fresh water to dilute.

As others mentioned in the posts above, you could also just add CYA granules; however, for me the granules took a while to disolve and some even came out the returns. I found that temporarily using Trichlor to raise my CYA was easier as long as you test regularly and switch to an unstabilized form of chlorine (i.e. bleach) once you reach your desired CYA level.