Yes, you have some room to let your CYA rise a bit so you can continue to use dichlor. Look at your manual for your SWCG. It will tell you how high the CYA needs to be for your unit. Once you get it at that point, then just use your SWCG.

Just use a 10mL sample when you test chlorine instead of a 25mL one. It will make your testing reagents last longer. You can multiply the number of drops by 0.5 instead of 0.2.